Summary
Keep it simple! If collecting and analyzing data are too hard, it won??™t be done. Don??™t
try to chart every metric you have. Start by identifying where the problems are in
your organization, and devise metrics to track and monitor your current processes
and improvement efforts. Or you may start with a list of metrics that you currently
collect and use, and decide which ones (two or three) might relate to the problems
your organization faces.
SPC depends on historical data. It also depends on accurate, consistent process
data. If you are just beginning the process improvement journey, do not jump into
SPC. You (your data) are not yet ready for it. That??™s why the CMMI waits until
Maturity Level 4 in the staged representation to suggest the application of SPC
techniques. At Level 2, processes are still evolving. At Level 3, they are more consistent.
Level 4 takes process information from Level 3 and analyzes and structures
both the data and their collection. Level 5 takes predictable and unpredictable
processes, and improves them.
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