Chapter 12 - FIT CRITERIA AND RATIONALE
SCALE OF MEASUREMENT - The scale of measurement is the unit you use to test the conformance of the product to its requirement. For a usability requirement, you can measure the time needed to learn product, or the time taken before achieving a particular level of competence, or perhaps even the error rate of the work done using the product.
FORMS OF FIT CRITERIA -
Defining the Data - Defining the data is to define each term as part of the fit criterion of each individual requirement.
Graphic Fit Criteria - When writing fit criteria, the aim is to be as implementation neutral as possible, thereby giving the designers and developers the maximum amount of freedom in choosing how to meet each requirement.
Decision Tables - fit criterion defines the rate of discount that a customer should have depending on how long he has been a customer, what his cumulative spending is, and whether he is a member of the customer loyalty program.
USE CASES AND FIT CRITERIA - A use case, whether it is a product use case or a business use case, is a collection of requirements—both functional and non-functional—working toward a desired outcome. While each requirement has its own fit criterion to measure its performance, the fit criterion for the use case as a whole is the benchmark for the collection of requirements when they act together.
FIT CRITERION FOR PROJECT PURPOSE - The project's purpose is a statement of the reason for making the investment in the project. If you go to the trouble and expense of developing a project to develop a product, then it makes sense to have an objective benchmark to measure the delivered product against.
FIT CRITERIA FOR SOLUTIONS CONSTRAINTS - Constraints are a special type of requirement—they are global requirements, usually pre-ordained by management—but they still need to be specified
correctly just like any other type of requirement.
FORMS OF FIT CRITERIA -
Defining the Data - Defining the data is to define each term as part of the fit criterion of each individual requirement.
Graphic Fit Criteria - When writing fit criteria, the aim is to be as implementation neutral as possible, thereby giving the designers and developers the maximum amount of freedom in choosing how to meet each requirement.
Decision Tables - fit criterion defines the rate of discount that a customer should have depending on how long he has been a customer, what his cumulative spending is, and whether he is a member of the customer loyalty program.
USE CASES AND FIT CRITERIA - A use case, whether it is a product use case or a business use case, is a collection of requirements—both functional and non-functional—working toward a desired outcome. While each requirement has its own fit criterion to measure its performance, the fit criterion for the use case as a whole is the benchmark for the collection of requirements when they act together.
FIT CRITERION FOR PROJECT PURPOSE - The project's purpose is a statement of the reason for making the investment in the project. If you go to the trouble and expense of developing a project to develop a product, then it makes sense to have an objective benchmark to measure the delivered product against.
FIT CRITERIA FOR SOLUTIONS CONSTRAINTS - Constraints are a special type of requirement—they are global requirements, usually pre-ordained by management—but they still need to be specified
correctly just like any other type of requirement.
Chapter 12 delves into establishing and refining one’s descriptions for functional and non-functional requirements using fit criteria. Fit Criteria is defined as a measurement standard or benchmark by which the product will be evaluated. All interested and active stakeholders are involved in evaluating the product’s functional and non-functional requirements and such stakeholders should be included in determining the fit criteria that will be applied. This fit criteria is supported and justified by a rationale or reason for the product’s capabilities or intentions. This rationale often explains the basic underlying need for a product/ service and is linked to the user’s expectation.
ReplyDelete'Fit Criteria and Rationale' chapter shows how measuring requirements makes them unambiguous, understandable, communicable and testable. So, fit criterion is the measurement of the requirement which quantifies the behavior, the performance, or some other quality of the requirement. The rationale is the reason or justification for a requirement and attaching a rationale to the requirement makes easy to understand the real need. Analyze the description and rationale for the requirement, to get the appropriate fit criteria. To measure any requirement, there is a suitable scale and scale of measurement is the unit. Scales of measurement exist for all sorts of qualities such as color, loudness and softness of sound, amount of light and many more. As a result, a fit criterion is neither a test nor a design for a test but an unambiguous benchmark.
ReplyDeleteFit Criteria and Rationale – In this measuring requirements are showed to make them verifiable, transferable, distinct and understandable.
ReplyDeleteScale of measurement – A suitable scale is required to measure any requirement. A scale of measurement is a unit. We use sale of measurement to test the conformity of the product to its needed requirements. With scale of measurement, anything can be measured.
Look and feel requirements – In this we identify the appearance or look of the product , quality or character of the product and also the feeling of the purchaser when using the outcome or product.