Jim McCall produced a quality framework model for the US Air Force to bridge the gap between users and developers. The framework defines quality factors divided into software quality, product operation, product revision, and product transition categories. McCall's triangle of quality relates these factors to quality metrics. Product operation factors are defined by metrics expressions to quantify attributes. The approach is user-oriented at the highest level and software-oriented at lower levels, allowing periodic quantification during development.

1. McCall’s Quality
Framework
Prepared by-
Priyanka Chittar (14030141007)
Shwetha Bhat (14030141029)
Sourov Das (14030141080)

2. INTRODUCTION
 Jim McCall produced this model for the US Air
Force’s computer based command and control
software.
 The intention was to bridge the gap between users
and developers
 Map the user view with the developer's priority.
 Quality was a way to derive Quantitative
measurement of software for objective analysis.

3. McCall’s Quality Factors
 The factors are divided into three categories
Software quality factors
Product operation factors
Product revision factors
Product transition factors

4. Mc Call’s Triangle Of Quality

5. Relationship between quality
factors and quality metrics

6. Product Operation Factors
McCall’s approach is to define a set of metrics
and develop expressions for each quality
factor according to which :
Fq = c1 m1 + c2 m2 + ... + cn mn
where,
Fq is a quality factor,
cn are regression coefficients and
mn are the metrics that affect that quality
factor.

7. Major aspects of approach
 User-oriented at highest level.
 Software-oriented at lower levels.
 Provides quantification of the attributes.
 Can be applied periodically during software development.
 Additional metrics, criteria or even factors can be added as
the technologies of producing software change and as
research efforts identify better measures.

8. THANK YOU.. !!