Our company has a documented process which requires the gathering of user need and then expanding upon them to create requirements. In addition potential hazards need to be reviewed and requirements to mitigate them must also be included in the design,.
We normall break the total requirements into classes (like basic functions, required functions, nice to have additions, etc) and implement a class per iteration (thru all stages) so that a product can be delivered early that the customer can evaluate and give feedback before final product is delivered.
In agile requirements can change at any time and in fact they are expected to. The idea behind the iteration is to plan what requirements are executed in that iteration and at the end of each iteration the project is reviewed, new reuqirements logged, and then the next set of requirements implemented. (Speaking in broad terms)
thank you so much. I'll listen to the archive since I missed the first few slides. For some reason Chrome didn't work I had to switch to firefox. I know a lot of people had problems also. See you tomorrow
no real question; my company is a service company, so customer requirements are the results of the service. try to get what technicians want. i am primary hardware designer, so i have to input how to get the hardware to work right. so, overall, software requirements are slow in coming, because technicians generally don't care until the tool gets into the field.
I don't go into too much detail on Agile specifically. I just mentioned it to help introduce the design cycle concept and that there are different ways to go about the design cycle. I'll focus more on the commonalities
I put both functional and non-functional requirements in the same document but I list them under different headings. So I might have an I2C requirement with functional and non-functional requirements so under I2C I list the background need then break it up into requirements.
bobybacs, there are trade-offs in different design cycles. What you'll find is that many of them have the same stages such as Requirements, Design, Consturction, etc but the methods they use within them vary from extremely strict to flexible.
Waterfall is generally not recommended because you have to be perfect upfront and there isn't a lot of room for error or changing requirements. I personaly like agile because it allows requirements to change and for me has been a pretty flexible process.
A funcational requirement describes the behavior of the system. It is a capability of the system. Non-functional requirements try to constrain the solution and are usually performance, safety, reliability related.
Do you have a recommended practice for software requirements? One practice we have been driving towards is to state requirements from the perspective of the output. The (named) Output shall (do something like turn on/off; increase/decrease) in response to (named) Input changing (state)(amplitude)(0ther).
We will cover test plan and test cases in more detail later this week. But as a preview the test plan will develop the process and resources that are used for testing where the test cases are simply do this, expect that and record what you saw.
We have had to lift the process up a level by adding User Needs and use cases. From this information that is used to create requirements. These requirements are then merges with IEC standards requirements.
Best way to get requirements we have found to to build a proof of concept that implements our best guess of the desired product. people have a lot easier time telling us what they DONT want than what they do want.
Again, we're currently working on making more formal design docs for our own sanity and to define project milestones. Currently spend a lot of time on conference calls and creating block diagrams and writing emails to nail down specs.
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