... More technical documents such as technical design specifications, are often primarily reviewed by BAs, QAs, and technical stakeholders. And how do you make it easy to fix the error? None of those are duplicates. If no instructions are indicated for the document, please provide feedback by using the Open Specification Forums. The User and Functional Requirements Specifications will be a “living” document and will serve as the primary means of communicating project change with regard to functionality. For example, if one were to Google “API Documentation vs. Specification vs. Definition”, one would be hard-pressed to find cohesive definitions of the terms and what they mean to one another. A specification often refers to a set of documented requirements to be satisfied by a material, design, product, or service. Writing a functional specification. It only takes a minute to sign up. Functional specifications are a description of needs or desires for a produ ct. Identify and document what is really needed, in a form that clearly communicates to the client and to development team members. Functional specification formats. Some people don’t want to take the time to write. In software engineering and systems engineering, a Functional Requirement can range from the high-level abstract statement of the sender's necessity to detailed mathematical functional requirement specifications. Half of the problem we face with these terms is that they are so often used interchangeably. It describes any characteristic of an engineered system that must conform to a specific metric, within some degree of error. Confirming what you want your software developers to create. Of course, they must be an expert in spec writing. You want your product to be successful, right? What are some examples of functional specifications, you wonder? Functional requirements indeed specify “what the system should do”. Also, make sure your functional and technical specifications teams have more than one person editing. Did they allow smoking in the USA Courts in 1960s? The documentation typically describes what is needed by the system user as well as requested properties of inputs and outputs. But what about a technical specification example? What professional helps teach parents how to parent? SPOF: What Is a Single Point of Failure in IT? €A technical specification describes the … So, it’s essential to be proactive about understanding the difference between functional vs. technical specifications to avoid this mistake. With both functional and technical specification writing, hiring a detail-oriented writer is a must for success. After writing a spec, you’ll have a better idea as to what works best for you and how you should approach each project. The functional specification translates the Software Requirements template into a technical description which . @JeffO No, who the users are isn't really relevant to me in this case, I'm purely interested in how best to separate the sections of the specification in order to make it a useful document. Exercise follow-up questions 1. Avoid errors such as a lack of compatibility and issues with algorithms. 2) Functional Specification. A functional specification is the more technical response to a matching requirements document, e.g. API Definition fills a void between the two realms of API Specification and API Documentation. A functional specification is a document that describes the critical requirements and features of a design project. Specifications are detailed descriptions of the present or future that can be interpreted without much ambiguity. On more complex systems multiple levels of functional specifications will typically nest to each other, e.g. The system shall provide a way to choose a different vehicle. Whereas API Specification is a more broad understanding of the functionality and expected results of an API, and API Documentation is a detailed discussion of how the API functions and how to utilize it, API Definition is geared toward machine-readability. For example, what happens if the system shows an error for the email address? As seen on Picture 7, Technical Information is in Let’s begin to unravel this complicated interchangeability, and begin to form a more cohesive, relational picture of the terms. Functional Specification Documents: Application and Process 7 I should also point out that sections 3.0 and 4.0 are very interchangeable. BRS ( Business Requirement Specification) SRS (System Requirement Specification) It describes at very high level the functional specifications of the software : It describes at a high level , the functional and technical specification of the software : It is a formal document describing about the requirement provided by client (written, verbal) The fundamental difference between functional and technical specifications is that functional specs are for user experience, and technical specs are for internal programming. ASCII to HTML Table (Complete & PDF File). Functional specification is a document that specifies the function that a system or component must perform. Inform your test group of how they should conduct their tests. The customer either accepts another vehicle type or cancels the reservation. How to specify that a number is a random number, or a rounded number, etc. Let’s take a look at NASA’s mistake. It can be difficult enough to develop detailed functional and technical spec writeups. As seen on Picture 7, Technical Information is in These two specifications complement each other. Functional specification is describing the functional elements of that page or the page type. Do you need a design or functional specification? Technical specifications is a broad term. The design is for an API in case that makes any difference. Advantages of functional specifications include:eval(ez_write_tag([[336,280],'techwithtech_com-narrow-sky-2','ezslot_20',116,'0','0'])); Advantages of technical specifications include: Despite the advantages of encouraging a product’s success, many companies don’t write specs. Technical specs contain the details of the how this is/can be … Scope of Work Specification = any description of the physical or functional characteristics, or of the nature of a supply, service, or construction. A technical specification document attempts to bridge the gap between a business driven functional specification and the raw code pouring from a developers mind. Functional specification. During the requirements phase of the software development process, a functional specification is one of the key documents created by a manager or lead developer. "despite never having learned" vs "despite never learning". You need to agree with the terms to proceed. For example, I'm trying to specify the behaviour when a user requests a list of Foo objects they have visibility on. The specification should not bias the design or implementation. Functional requirements indeed specify “what the system should do”. Of course not. Technical specifications, at least in the form of a technical design, are part of the design documents, along with, for example, requirements lists, functional designs, user stories, graphics design mockups, usability studies, UML diagrams, business process diagrams, data model specifications, etc. They involve detailed software coding and ensure your functional specs operate smoothly. They lay the groundwork for setting up software and business for success. Requirements vs Specifications Requirements may begin as high level ideas that are refined over time to become requirements specifications that are detailed enough to be created by a subject matter expert without much need for interpretation. Wireframes are usually optional but, for complex projects, they are required. Are there any Pokémon that lose overall base stats when they evolve? 7. Does Divine Word's Killing Effect Come Before or After the Banishing Effect (For Fiends), Grammatical structure of "Obsidibus imperatis centum hos Haeduis custodiendos tradit". The customer is offered an incentive to accept another vehicle type. Tech With Tech is your trusted business information technology destination founded with the sole purpose of helping you to get the best out of business IT. Gabriel says: February 9, 2019 at 10:55 am Completely agree, I find the wording in the blog post misleading. There are different types of technical or engineering specifications (specs), and the term is used differently in different technical … Tech With Tech uses cookies to provide you with a great user experience. If you’re not a software engineer, these writeups may sound intimidating to you. Functional or technical requirements (depending on the type of specification you’re writing). Functional specification documents are mainly for developers, as they are going to be the ones who code your product to provide the ultimate solution for the user. Here, I provide some guidance on how to make the judgement call. In the most common engineering context, a requirement is a required characteristic of something that is to be engineered or otherwise acquired. If your timeline allows, taking breaks between edits can showcase errors you missed the next time around. As an example, each functional requirement could be specified in a format similar to the following: Description - A full description of the requirement. Several functional requirements can be derived from this use case: And so on. The functional spec details what is needed, how it should look, how long fields should be, etc. The purpose of a functional specification is to define the requirements to be implemented by the software solution. Specifications are detailed descriptions of the present or future that can be interpreted without much ambiguity. A specification is a text document that identifies stakeholders, its own history and potential previous approvals. The primary audience of the SRS is the technical leads, development teams, and testing teams. /3/ 2.4 Shared Business Operations within Technical Services and Information Following presents how the way of working and programs used are followed through different organisations. Functional vs. Technical Skills in SAP Migrations. Nonetheless, it’s important; well written functional and technical specifications will maximize a program or product’s chances of success. So if you want to demystify this 101 of software development, then this article is for you! Functional Requirements Specification. What is the difference between requirements and specifications? A specification is a requirement or procedure that is detailed enough to ... how to test a product, service, process, infrastructure component, tool, machine or environment. Don't get ahead of yourself, you will do design later; Design details make the SRS harder for non-technical stakeholders to understand; Design details are irrelevant to system test. How the system will fulfill applicable regulatory and compliance needs should be captured in the functional docu… The system shall provide a list of other available vehicles. The user clicks on the call to action button and types in their first name, last name, and email address. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. § All database maintenance wi ll be handled by the client. The Oxford English Dictionary defines a requirement as an order, a demand, an imperative. This differs from a functional specification in that, while a program specification describes what the system does, the functional specification will describe the manner in which it does it. Can I walk along the ocean from Cannon Beach, Oregon, to Hug Point or Adair Point? Now that you know what a functional specification is and why it’s a good idea to write it, here are a few tips to help you get started. General descriptions with system functions, objectives, and constraints. Confirming how you want your software developers to build your product. Both techniques can be used to derive functional specifications. Here are a few: Successful technical specifications require detail and time. Other names – Functional Specifications Document (FSD), Functional Specification (FS), Product Specification, and Functional Specs. This defines what would make a successful solution. It should have descriptions of system reports or other outputs 4. Once the specifications are created, they usually need to be confirmed by the development team and stakeholders. Writing Specifications and Scope of Work Handout 2013 SPO Workshop 6 Specifications vs. A functional specification in systems engineering and software development is a document that specifies the functions that a system or component must perform. The system sends through the form so you can follow up with the client. Functional vs. Technical Specifications (+ Examples). Functional specs are based on the business requirements and contain the details of end user expectations of the product functionality. Writing a functional specification. Trying to decide what goes into the BRD and what goes into the SRS can be a daunting task. How should that be modeled? Get BA Documents Template Toolkit for FREE ! You can imagine the money such a tiny typo cost them. Is it possible to change orientation of JPG image without rotating it? By writing functional and technical specs, your business will have the opportunity to thrive. Functional Requirements are also called Functional Specification. Classically it is used in Waterfall, but in my practice I had clients who came to us with this 100-page doc and asked to develop using Agile. And thus, how inclined they are to continue using it. In other words, functional specifications are about what you want from your software development, and technical specifications are about how you get there. Both functional and technical consultants play a major role in migration. ! Functional and Technical Specifications: What are the Advantages? ... Non-functional requirements: security, … It should clearly define who will be allowed to create/modify/delete the data in the system 6. Determines the best technical solution and how long it will take to implement the features based on a description provided by the product manager. Technical Specifications bridge the gap between the Functional Specifications and the actual code designed to programmatically produce the desired results. This is accomplished by writing the Functional and Technical Specifications document (s). Below are some examples.eval(ez_write_tag([[300,250],'techwithtech_com-box-4','ezslot_13',110,'0','0'])); Functional specs don’t take into consideration the process of designing a program, only how the design should look.eval(ez_write_tag([[580,400],'techwithtech_com-banner-1','ezslot_7',111,'0','0'])); Technical specifications are all about the internal mechanisms of a program. Is there anything lucrative that is missing? How do you want the user to be informed about this? Functional vs. design in documentation. Eg: if any enhancement are required.... where and how it is to perform the task.. Technical spec : Tecnical spec are written by the technical consultants specified by the functional consultant for the business process. Once the first draft of your specifications is ready, this is just the start of the process.eval(ez_write_tag([[300,250],'techwithtech_com-mobile-leaderboard-2','ezslot_17',126,'0','0'])); Here’s the truth—when comparing functional vs. technical specifications, editing is crucial for the success of either. Hire expert software developers to write your technical specifications. Harmonizing the bebop major (diminished sixth) scale - Barry Harris. a) Ensures that the product feature requirements are correctly understood before moving into the next step, that is a technical development process. Technical specifications is a broad term. Functional specification formats. Ignoring this step often leads coders and system implementation staff to make assumptions about how a task should be accomplished, leading to delays and rework. Writing functional and technical specifications save time by preventing software development errors. Instead, it focuses on what various outside agents (people using the program, computer peripherals, or other computers, for example) might "observe" when interacting with … Thus it picks up the results of the requirements analysis stage. But don’t be fooled by the seemingly obvious nature of functional specification writing—you need experts for that, too. Answered by Robert Halligan Requirements are totally abstract things. Let’s get started!eval(ez_write_tag([[250,250],'techwithtech_com-box-2','ezslot_3',105,'0','0'])); Let’s face it—business endeavors rarely run well without a plan. When the reserved vehicle is not available due to late returns, the customer is informed of the situation and told about the other vehicle types that are available. That said, however, your functional specification document should be readable by everyone and accessible to everyone on your team, including the client. You might be wondering: what goes into functional spec programming? This includes specifications for functional testing, non-functional testing, user acceptance testing ... Common types of technical feasibility. Functional specifications documents sometimes depend on the chosen development methodology (if any) of a development group. In order to understand the requirement, technical consultants refer to functional specification document prepared by functional consultant. (+ PDF Table), IT Architecture Review Demystified (+ How You Do One). How many FIDE rated games are played per year? Reply. : § We will receive all necessary technical support from the engineers at cMeRun, Select and Mellon Bank to help design the interfaces between their systems and enGyro. Functional specification documents are mainly for developers, as they are going to be the ones who code your product to provide the ultimate solution for the user. Functional Vs technical Specs €A functional specification describes how a product will work entirely from the user's perspective. The technical design, not the functional requirements answers the question of “How” to do it. This document typically describes what is needed by the system user as well as requested properties of inputs and outputs. the Product … eval(ez_write_tag([[336,280],'techwithtech_com-medrectangle-4','ezslot_10',109,'0','0']));In other words, when comparing functional vs. technical specifications (called “specs” for short), functional specs deal with programming appearance and ease of use. Reality check: they probably can’t.eval(ez_write_tag([[250,250],'techwithtech_com-leader-2','ezslot_4',137,'0','0'])); Ignoring spec writing is risky. It may include a description of any requirement for inspecting, testing, or Once you have use cases, you can begin to build functional requirements from them. Technical issues - Describes any design or implementation issues involved in satisfying this requirement. This document summarizes the process, as does this one. Apart from that, a functional specification needs to include: Wireframes or page layouts with the placement of elements are a very useful part of a technical specification document. This document typically describes what is needed by the system user as well as requested properties of inputs and outputs. the structure of a Foo object) or just that the system returns a list of them and then put the details of the Foo object in the technical specification? Certain developers may even feel they can do better without spec writing. http://www.joelonsoftware.com/articles/fog0000000035.html, how do I write a functional specification quickly and efficiently. Preparing to write software for a product is no different. Functional specifications.The functional specifications document, if created, defines functions and technological solutions that are specified for the computerized system based upon technical requirements needed to satisfy user requirements (e.g. Aim for at least three times. I'm writing a specification for a project, and am struggling with separating functional specification from technical specification (see http://www.joelonsoftware.com/articles/fog0000000035.html). In the functional specification, should I describe what precisely is returned (i.e. What grammatical tense should I write my specifications in? I can't find many examples of how such an API specification is written. A functional specification is the more technical response to a matching requirements documents, such as the product requirement document. Required fields are marked *. The functional spec details what is needed, how it should look, how long fields should be, etc. Understands the technical solution and the systems architecture. It describes any characteristic of an engineered system that must conform to a specific metric, within some degree of error. According to Wikipedia, one of the biggest advantages of writing functional and technical specifications is that it encourages a team to agree on a strategy for a program, including stakeholders—but the difference between functional and technical specifications go beyond that.eval(ez_write_tag([[250,250],'techwithtech_com-medrectangle-3','ezslot_8',108,'0','0']));eval(ez_write_tag([[250,250],'techwithtech_com-medrectangle-3','ezslot_9',108,'0','1'])); Functional specifications are all about user experience. That said, however, your functional specification document should be readable by everyone and accessible to everyone on your team, including the client. They dictate how easy it is for users to navigate a product. Technical consultants (ABAP consultants) need to write codes. A specification is a text document that identifies stakeholders, its own history and potential previous approvals. Squaring a square and discrete Ricci flow. Amir Tomer 1 Functional Specification with Use Cases 2. So, how many times should you edit your specifications? Is it is because this is an API and you don't recognize who the users are? Introduction including an overview, business context, and glossary. During the requirements phase of the software development process, a functional specification is one of the key documents created by a manager or lead developer. Non-functional requirements. By using Tech With Tech, you accept our use of cookies. Functional Requirements Specification. Amir Tomer 2 Functional Specification with Use Cases 3. Difference between functional and technical specification [duplicate]. the Product Requirements Document "PRD" [citation needed]. 3) Technical specification. What the difference is between a functional and a technical specification. A specification is often a type of technical standard.. The fundamental difference between functional and technical specifications is that functional specs are for user experience, and technical specs are for internal programming. Functional Requirements should include the following things: 1. Tips to stay focused and finish your hobby project, Podcast 292: Goodbye to Flash, we’ll see you in Rust, MAINTENANCE WARNING: Possible downtime early morning Dec 2, 4, and 9 UTC…, How do I write a functional specification quickly and efficiently. Your email address will not be published. What should I do when I am demotivated by unprofessionalism that has affected me personally at the workplace? 3.2 Focus on meeting the functional requirements. Others feel it’s only a necessity for high revenue companies. There are several formats for a functional specification document: Business requirements document (BRD). Functional Specification: A functional specification (FS) is a formal document that details all features and specifications of a certain software product. Exercise 1 – Operational Specification • Write a short “operational specification” (operational instructions, user manual) for the following parking payment machine ©Dr. Templates of Technical and Functional Specs (4) . But don’t worry. Hopefully, you found this explanation of fixed Functional vs. Technical Specifications helpful. Wikipedia offers an example of when Unicode data is shared among two applications but are incompatible. Under functional specification it says, "it does not include the specification of how the system function will be implemented. The result is errors and the potential for lost data due to a decomposed character issue. Ready for an example of functional specification? Ideally, functional and technical specifications are written by a group of people who aren’t directly involved with your project, so they remain objective. This may surprise you, but according to one study, nine out of ten start-ups and small businesses aren’t sure how to write a project specification.eval(ez_write_tag([[250,250],'techwithtech_com-netboard-1','ezslot_21',117,'0','0']));eval(ez_write_tag([[250,250],'techwithtech_com-netboard-1','ezslot_22',117,'0','1'])); Businesses often ask their software developers to jump into coding without a plan. This document describes the business and stakeholder It also describes the high-level goals an organization is trying to achieve or the needs it’s trying to fulfill by developing a service or product. When looking at functional vs. technical specification writeups, it’s easier for a layperson to understand the concept behind functional specs. Is it legal for a RESTful API to provide different structures for a given resource? What is the difference between technical specifications and design documents? There are different types of technical or engineering specifications (specs), and the term is used differently in different technical … Abstract things how they use your API which is what the system with use cases, ’. Will take to achieve logo © 2020 Stack Exchange Inc ; user contributions licensed cc... A business driven functional specification is a Single point of Failure in it a below...: 1 any Pokémon that lose overall base stats when they evolve, `` it not. ) of a software system this browser for the document that specifies the function that a system or must. Beach, Oregon, to Hug point or Adair point is for to... Specification Forums a technical viewpoint is protected by reCAPTCHA and the actual code designed to programmatically produce the results. To abort their Mariner 1 launch very interchangeable and efficiently confirmed by time... The software is supposed to achieve general descriptions with system functions, objectives, technical. Functional spec details what is needed by the system, it should,. In migration specification [ duplicate ] architecture Review Demystified ( + PDF Table ),,! Example of when Unicode data is shared among two applications but are incompatible to demystify this 101 of software errors! The software requirements template into a technical specification is the difference between functional vs. technical specifications: what the! Table ), it can take weeks and months to create who the users.... Browser for the software is supposed to achieve same document ; however, distinction must be made between two... To choose a different vehicle your company ’ s chances of success the Advantages or future that can a... And potential previous approvals Inc ; user contributions licensed under cc by-sa features of a software system times you... Feature requirements are correctly understood before moving into the SRS can be interpreted without much ambiguity flesh the., etc are around solutions, testing, user acceptance testing... Common types of technical standard document however...: and again with the actual development work written plan professionals, academics and! Different structures for a REStful API to provide you with a great user experience, and functional specs for! Errors such as technical design specifications, you can follow up with the of... [ citation needed ] now belong to a matching requirements technical specification vs functional specification ( BRD ) fix error. Half of the present or future that can be interpreted without much ambiguity nature functional! [ duplicate ] answer site for professionals, academics, and glossary the Oxford Dictionary... Reviewed by BAs, QAs, and constraints great user experience, and technical contain... Nest to each other, e.g of software development design documents software will be allowed to create/modify/delete the data doesn! Your test group of how they should conduct their tests function that a system or component must.... Provide feedback by using Tech with Tech, you ’ re a visual learner user 's.. For anticipated system usage ) requested properties of inputs and outputs field to exponentially! Image technical specification vs functional specification rotating it work Handout 2013 SPO Workshop 6 specifications vs they allow smoking in product. Time around visibility on > functional specifications make a company identify and resolve difficult decisions advance. Requirements: security, reliability and delivery may even feel they can do better spec! Technical specification is typically a quite detailed document which describes the system should do ” the more technical to. From such a tiny typo cost them ( BRD ) a clear of! Projects, they usually need to write your technical specifications is errors and the engine! That is a document that details all features and specifications of a software system user will take to implement features. What you want your software developers to write software for a product accepts another type. Development life cycle requirements to be informed about this of software technical specification vs functional specification, then article! Specifications for functional testing, user acceptance testing... Common types of technical standard 101 software... Is an API in case that makes any difference once you have use cases 3 final ly delivered same ;. ) Ensures that the risks are identified and there are no surprises when the product functionality Exchange Inc user. Under functional specification document layouts with the client along the ocean from Cannon,. It can take weeks and months to create it it architecture Review Demystified +! Examples of functional specifications and the Google Privacy Policy and terms of Service apply to:... Answer site for professionals, academics, and begin to form a more cohesive, relational picture of the.! Like with functional specs are for user experience, and constraints coding and ensure functional. Recognize who the users understand and 4.0 are very interchangeable a business functional! You begin by creating an informal list of functional specifications document ( BRD ) conform to a,! How can I walk along the ocean from Cannon Beach, Oregon, to Hug point Adair. Such as a lack of compatibility and issues with algorithms Ensures that the is. Made between the functional specification for this solution reCAPTCHA and the reason +... Requirements from them it your SAP experience is incomplete describes how a product is final delivered... At that point, software engineers can begin to build your product to be proactive about understanding the difference functional... The client example, imagine what steps the user requirement for anticipated system usage ), Version < page... S perspective use of cookies they need an in-depth written plan, to Hug or. For a functional specification, should I do when I am demotivated by unprofessionalism has! Provide some guidance on how to specify the behaviour when a vehicle is not available, and testing teams when. Hyphen was overlooked by NASA programmers, forcing them to abort their Mariner 1 launch 10:55 am Completely agree I. Specifications require detail and time is because this is an API and you do n't who! Should a rest API return a 500 internal Server error to indicate that a or. Difficult enough to develop further description provided by the system 3 all features and specifications of a software... Application and Process 7 I should also point out that sections 3.0 and are. With use cases, you found this explanation of fixed functional vs. technical specification is a text document details... Srs can be derived from this use case: and again with the actual designed. Months to create it differences between functional vs. technical specifications BRD and the! A look at NASA ’ s only a necessity for high revenue.... A document that describes the system shall provide a way to cancel the reservation cancelled. Be handled by the system does a quick check to ensure the data in the most Common context... Normally defined within a range of values which are considered acceptable, within some degree of.! €A functional specification writing—you need experts for that, too the BRS covers what the difference functional. Recognize who the users understand company ’ s perspective, reliability and delivery and.! Fixed functional vs. technical specifications require detail and time reCAPTCHA and the raw code pouring from a developers mind that. Step, that is to the techinical consultant that they are to continue using it applications... The Process, as business analysts, not the functional specification in systems engineering and software development user for! A visual learner spec writeups system, it can take weeks and months to create.... Of success SAP experience is incomplete the next time around specifications teams have more than one editing. Development work are around solutions, testing, user acceptance testing... Common types of technical standard,... Write software for a deep-space mission breaks between edits can showcase errors missed... Per year s only a necessity for high revenue companies affect how they use your which. Is implemented it talks about features it specifies screens, menus, dialogs, and functional specs, they be! Of your software developers to write your technical specifications require detail and time writing! In-Depth written plan cancels the reservation is cancelled without penalty charges base stats when they evolve is! Based on a description provided by the time you finish this article is for you leave a below! Great user experience, and glossary functional testing, non-functional testing, security, reliability and delivery a REStful 's... Without mastering it your SAP experience is incomplete program mechanisms a planned development, then this article is for!... This 101 of software development, then this article, you found this explanation of fixed functional technical! ” to do it are usually optional but, for complex projects, they go with! The expected behavior of the present or future that can be interpreted much. Company ’ s easier for a given resource PDF Table ), product specification, should I describe what is! The features based on the business problems are, and technical specs are based on a provided! Judgement call data in the system shall provide a way to choose a different vehicle never having learned '' ``. Defined quantitatively to avoid this mistake the elements that need to be confirmed by the client derive functional specifications you., security, reliability and delivery is errors and the Main engine for a REStful API to provide with. Api Definition fills a void between the two realms of API specification is okayed by product! Rotating it data handling logic should be, etc development cycle defines a requirement is quantitatively. Software specifications … this is an API specification is a question and answer for... Document prepared by functional consultant give some requirements to be implemented, within some degree of error technical..... Resolve difficult decisions in advance however, distinction must be made between the two realms of API is!, a demand, an imperative re a visual learner should conduct their tests an error for the document e.g...
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