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Change should to must; leave design-choices open

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Alexander Lill 2023-03-31 15:04:16 +02:00 committed by GitHub
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chapters/requirements.bd
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@ -16,11 +16,11 @@ There are some approaches to specifying requirements _formally_. These technique
Expressing requirements in natural language can mitigate these effects, at the expense of precision. They just have to be *complete*, *precise*, *non-conflicting*, and *verifiable*. For example, consider a design for a simple to do list application. It's requirements might be something like the following: Expressing requirements in natural language can mitigate these effects, at the expense of precision. They just have to be *complete*, *precise*, *non-conflicting*, and *verifiable*. For example, consider a design for a simple to do list application. It's requirements might be something like the following:
* Users should be able to add to-do list items with a single click. * Users must be able to add to-do list items with a single action.
* To-do list items must contain text and a binary completed state. * To-do list items must contain text and a binary completed state.
* Users should be able to edit the text of to-do list items. * Users must be able to edit the text of to-do list items.
* Users should be able to toggle the completed state of to-do list items. * Users must be able to toggle the completed state of to-do list items.
* Users should be able to delete to-do list items. * Users must be able to delete to-do list items.
* All changes made to the state of to-do list items must be saved automatically without user intervention. * All changes made to the state of to-do list items must be saved automatically without user intervention.
Let's review these requirements against the criteria for good requirements that I listed above: Let's review these requirements against the criteria for good requirements that I listed above: