Chapter 12 Fit Criteria and Rationale
Fit means a solution completely
satisfies or matches the requirement
Formality Guide
Rabbit Projects: confirming each fit criterion with the
stakeholder, and writing the test case using that fit criterion
Horse projects: when the project has multiple stakeholders, different
stakeholders assign different meanings to requirements. Adding a rationale and
a fit criterion to each requirement means it is virtually impossible for
misunderstandings to occur
Elephant
projects: must
use rationales and fit criteria to avoid misunderstanding.
Why does fit need a criterion?
The benchmark is
the fit criterion—a quantification of the requirement that demonstrates the
standard the product must reach.
The
idea is for each requirement to have a quality measure that makes it possible
to divide all solutions to the requirement into two classes:
1. those
for which we agree that they fit the requirement
2. those
for which we agree that they do not fit the requirement
The Rationale for the Rationale
The rationale is
the reason, or justification, for a requirement.
- Attaching a rationale to the
requirement makes it far easier to understand the real need.
- The rationale is not only a
guide to help you find the fit criterion, but also a means to help you
know when you have several different requirements masquerading as one.
- the rationale provides
the basis for making decisions about how to implement the requirement
- The rationale is the
cognitive thread that connects the business and the delivered product
Deriving Fit Criteria
This
requirement is fairly subjective and slightly ambiguous
Scale of Measurement
Any
requirement can be measured: All you have to do is find a suitable scale with
which to measure it. The scale of measurement is the unit you use to test the
conformance of the product to its requirement. Scales of measurement exist
for all sorts of qualities.
Fit Criteria for Non-functional Requirements
- Security Requirements
- Cultural Requirements
- Legal Requirements
With respect to CRM tool to be implemented at IG. Fit criteria can be defined from different stakeholders prospective. A very potent example of functional requirement for the said project is 'Product shall automate the conversion of data from excel files to database files.' and rationale behind this requirement is very clear to reduce the manual work to speed up processes for clients. Example for Non-requirements is 'Widgets should be customizable' has a straighforward rationale of providing the user a personalized experience so that they are able to make the most out of the platform.
ReplyDeleteBy applying CRM tool at IG. Fit criteria is one of the most important factor which can define by the stakeholders,have an impact on the successful project.Taking about the Fit Criteria for the functional requirement, we can say " Product should enable sharing file across the departments through admin's permission in minimum time" and the rationale behind is to let everybody use and get access to it from everywhere. To talk about the Fit criteria for the non-functional requirement, we can say "Product shall handle 1M users at any given point of time" and the rational behind is clear to let lots of users get access to at the same time without any crash, lag or even errors. So that's why Fit Criteria plays an crucial role in our project and the most important factor the Business Analyst must consider if they want a project successful.
ReplyDeleteThanks for providing this useful information about fit criteria and Rationale.
ReplyDeleteAs the fit criteria is quantifies, measures, the requirement, which makes it testable, which in turn allows the testers to determine whether an implementation fits the requirement. So, it is the one of the most important factor for a project to being successful. If we talk about the functional requirement of CRM tool of IG wealth management. It would be the CRM tool should automate the administrative tasks. So, the rationale would be to reduce the time and manual work like entering the data manually. The non-functional requirement world be, It should have animated icons. So, the rationale behind is that the users can easily use it and looks good in look.