part: "keeping the system running as intended" "correct/prevent faults" "adding new and/or improved functions" "adapt to changing environment" "improve function or performance" "help users" "documenting! " "never losing sight of the meaning of 'System'" is#configuration_management_and_control
tool: "change requests" "approve or reject changes" "re-cycle through SDLC" "plan, analyze, design, implement" "this requires configuration management"
#characteristic: "the most expensive component of system life cycle cost (Pressman suggests 70-80% of system lifecycle cost!)"
pm#annotation: "good analysis and design and documentation is paid for many times over by subsequent reduction in maintenance costs"
pm#annotation: "currently more programmers involved in maintenance than development!"
pm#annotation: "current and future trend: decrease in on-site maintenance"
part of: is#project_implementation_and_maintenance
pm#successor of: is#project_implementation
supertype: pm#situation something that "occurs" in a real/imaginary region of time and space
supertype: pm#thing__something___T__t___3D_or_4D_thing_or_anything_else any category (type or individual) is instance of this type; any type is also a subtype of this type
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