- Must: The requirement must be satisfied for the solution to be considered a success.
- Should: The requirement is essential and should be included in the solution if possible, but it’s not mandatory for success.
- Could: It’s a desirable capability that could be deferred or eliminated. Implement it only if time and resources permit.
- Won’t: This indicates a requirement that will not be implemented at this time but could be included in a future release.
The MoSCoW scheme changes the three-level scale of high, medium, and low into a four-level scale.
Advantage:
- More answers, more reflective
Disadvantages: - Difficult to decide between should and could
- Difficult do estimate if resources will permit