Functional Design Specification (FDS): A Trailer of the Development of a Web System

A Functional Design Specification (FDS) is a manuscript used by companies that are still in the underdeveloped stages. Furthermore, a complete requirements document is made by converting notes, ideas and scope into flowcharts, screenshots, and wire frames. It is most likely that an FDS will comprise of at least a chronological list of requirements that can be a source of endorsement for development, testing, and client sign-off.

Moreover there are a myriad of advantages for using a FDS prior to commencing development. All the people that are a part of designing, developing, testing, and approving of a function, sign-off on a manuscript consisting of a sequential listing of all design and functional requirements. As a result, time, resources, and most notably, money are all saved. Moreover when undertaking an enterprise the developing stage is highly alleviated, the quality is assured, and last but not least the consumer is aware of all the aspects of the final product. A large number of the flourishing development companies have an industry specialist, a development department, and a quality assurance department. An FDS avoids all the hassles of attempting to decipher the messy notes from restaurant napkins, and innumerable e-mails. In this case developers are assertive about what they're doing and approach the right modus operandi.

Furthermore, a Functional Design Specification must be the ultimate and only medium used in order for the developmental assignment to thrive. After accumulating the requirements, to enable the FDS to achieve that position, it has to firstly endure a broad review and approval process.

Each FDS consists of a group of active tracking numbers. Every requirement has a number, and represents either a design or functionality. Following a FDS sign-off the development segment begins, and during this process the numbers are locked. They then carry out specific duties, such as testing, bug-tracking, and approval. If there comes a time when things appear to get out of order, the defective tracking number is then located. This is when the quality assurance department comes in to the picture. For example, "There is a bug with Field X, because it is in the wrong format. Please refer to GUI 2.6.4." Thus, arduous jobs like testing and bug-fixing prove to be more controllable, and easily pinpointed. As usability expert Jakob Nielsen acquiesces, "The most common estimate is that it's 100 times cheaper to make a change before any code has been written than it is to wait until after the implementation is complete." As a matter of fact immediately after a FDS is done, it basically takes a matter of minutes for the change to be made. On the contrary, it is possible that a developer may take as much as a few days to implement the same amendment.

To sum everything up there is a document history table in each FDS that identifies the source of the disturbance. Factually changes always take place, and when they do, this table is renewed to point out alterations and indicate the victimized tracking numbers. Taking all aspects into consideration, as a whole this technique of resorting to a FDS is definitely more cost-effective, adaptable, and most importantly, immeasurably swift.