Modal form
Requirements can be written on five different modal forms:
- shall-form;
- present tense form;
- will-form;
- should-form;
- must-form.
All forms can be used in a Requirements Specification, but it is recommended that only one form is used consistently. Generally, requirements are written either on the shall-form, or on the present tense form, but not on both in the same Specification.
Allow a form by ticking the corresponding check box in the Modal form group. An un-ticked check box means that the form is not allowed. When a not-allowed form is used in a requirement, a serious issue is generated. When a requirement is not written on any allowed forms, a serious issue is generated.
If the Do not check form check box is ticked, no requirements are checked for compliance with the form rules.