Ensure requirements are complete
For a requirement to be “complete,” it should include all the necessary information to implement the requirement. This means when the designers and developers go to build out the function, they aren’t left making assumptions or guesses about the requirement.
For example, let’s say you’re developing a webpage. One of the requirements your document outlines is what should happen in case of an error. An incomplete requirement might say something like “In case of error, the system should exit smoothly.”
In this case, “smoothly” isn’t defined and is left up to interpretation. This ambiguity could lead to misinterpretation of the desired outcomes (and more work to go back and fix it).
To avoid this, write a complete requirement that defines what a successful function looks like:
“In case of error, the system must show an error page with the following message:
Uh-oh! It looks like something went wrong. Please try again in a few minutes. If the problem persists, contact our Support Team at support@website.com.”
By defining a complete requirement, there is less ambiguity and a clear outcome for the development team to work on.
Make requirements testable
This is a fairly ubiquitous standard, yet too often, organizations fail to write requirements that fully meet this rule.
Requirements need to be verifiable. Otherwise, there’s no objective way to know if the development team implemented the requirement satisfactorily.
For every requirement you write, make sure you can validate it through one or more of the following ways:
- Inspection
- Demonstration
- Walk-through
- Testing
High-level requirements often undergo inspection or user testing, so they typically rely on more general specifications. But lower-level requirements that undergo software testing will likely need more detailed specifications.
Apply implementation-neutral functional requirements
As we noted earlier, an SRD is not a design document. It does not and should not define how the functional requirements must be implemented from a design standpoint.
Therefore, all functional requirements should be implementation-neutral. In other words, requirements should state what the system should do, but not how it should do it.
There are several advantages to implementation-neutral requirements, including:
- A more efficient design process
- Modifiable requirements that aren’t dependent on a specific implementation design
- Less conflict between requirements resulting from opposing implementation details
Any constraints on implementation should be reserved for the non-functional requirements of the system.
Evaluate documentation with stakeholders
When all the software requirements have been documented, have all relevant stakeholders evaluate the final documentation before development begins.
Stakeholders should include designers and developers, testers who will validate the requirements, engineers, end-user representatives, and the client.
By having all stakeholders review and approve the documentation before beginning development, you improve satisfaction across the teams and increase the probability that the requirements will meet their needs.
Help software developers and their teams stay on the same page with flowcharts that efficiently and elegantly map out your software requirements specifications. Look for a diagramming solution that can help you:
- Organize your requirements into a flowchart to keep your components distinct, your dependencies clear, and the stakeholders apparent.
- Use swimlanes to visually describe which teams are responsible for each requirement set.
- Quickly modify requirements or other data as the project needs evolve.
- Link data (including additional documents) to support and inform your ongoing project.
- Share the documentation (and any changes) instantaneously with relevant stakeholders.
Documentation doesn’t have to be a chore. With Lucidchart, you can easily document processes, user stories, and software requirements in one location. By visually defining your requirements specifications, you and your team will be able to find and act on information quickly while reducing opportunities for errors, inconsistencies, and misinterpretations.
