CK Design Metrics Review

Transcript

1. N Li8 Presents CK Metric Presented By: Lavina Tekwani Li8 Technologies
2. ▪N li8 Schematic ▪ Metrics only for Java Classes. SourceCodeMetrics - plugin in Netbeans.
3. Weighted Methods Per Class ▪ Number of methods in each class, weighted by the complexity of each.
4. Website ▪WMC = 84 (total) ▪WMC = 4.2 (mean) App: ▪WMC =10.234 (mean)
6. App
7. Weighted Methods Per Class ▪ The larger the value, the greater the complexity. ▪ Threshold: 0-15 ▪ N Li8 App: 10.234 (is a little above half of the accepted threshold of 15) ▪ Objective: Low
8. Depth of Inheritance Tree ▪ Number of discrete levels in the inheritance tree. ▪ DIT = 4.14 (mean)
9. Depth of Inheritance Tree ▪ The larger the value, the greater the complexity. ▪ Threshold: 0 - 6 ▪ N LI8 = 4.149 ▪ ▪Objective: Trade-off
10. App
11. Number of Children ▪Immediate subclasses of a class ▪NOC = 3 (total) ▪NOC = 0.47 (mean)
12. Number of Children ▪ The larger the value, ▪ The greater the RE-USE. ▪ The more difficult is to TEST. ▪ Threshold: 0 - 6 ▪ N Li8 : 0.47 (mean) ▪ Objective: Trade-off
13. Coupling Between Object Classes ▪ Classes are coupled when methods in one classes use methods in another
14. Coupling Between Object Classes ▪ Small values of CBO Improve MODULARITY and promote ENCAPSULATION ▪ Threshold: 0 - 8 ▪ N Li8: 6.95(mean) ▪ Objective: Low
15. App
16. Lack of Cohesion in Methods ▪ Difference between number of method pairs without shared attributes vs. number of method pairs with shared attributes ▪ LCOM = 0.228 (mean)
17. Website
18. App
20. N Li8 - In a nutshell Metric N LI8 Value N LI8 WMC Low Not at all complex DIT Medium More reusable components NOC Medium Slightly difficult to test. CBO Medium Moderately modular not very dependent RFC Medium Testing and maintenance is good. LCOM Low Not so complex,good Encapsulation.
21. Thank You...