Methodology
Characterization-vector-based approach
1) build an extensible taxonomy of maintenance tasks
2) measure the normalized cost of each task on system
- result is a vector of costs that characterizes the possible components of a system’s maintainability
3) measure task frequencies for a specific site/system
- result is a frequency vector characterizing a site/sys
4) apply a site-specific cost function
- distills cost and frequency characterization vectors
- captures site-specific usage patterns, administrative policies, administrator priorities, . . .