The results come by effectively applying the TOC (Theory of Constraints) principles. CCPM (Critical Chain Project Management) is merely a way to apply these principles in typical projects environments.
Good use of CCPM results in delivery of more projects, faster and reliably. CCPM does not attempt or require any technical innovation. The new way of managing plugs the losses of time & capacity typical in multi-project environments. While we intuitively understand the losses, the magnitude surprises even the most seasoned people.
Some of the examples of losses are:-
A student first fights for a later target date for submission of an assignment so that he can be sure of doing a good job. But, almost never start immediately knowing that he can complete the work in less time. This tendency results in time losses. A very similar phenomenon happens in projects.
Just like a student submits a completed exam paper only after 3 hours, even if he finishes it in 2 hrs, most people report completions only on the due date. Just like the student will confirm & improve the answers again and again till the end of the last minute, people keep “improving” the work till the deadline approaches.” Work Expands to fill the Time Available’.
A manager of a resource when pressured by many different project managers will generally cave in to the demands of progressing on each of the available tasks. This result in the phenomenon called multi tasking. Each task which could have taken much lesser time, now takes much longer to complete.
The results come by taking active actions to cut the losses. It would be instructive to try & figure out the relative proportion of these in a real environment. Remember that it is better to be approximately right than precisely wrong.We lose tremendous amounts of time due to the interaction of the above phenomenon. While most people intuitive know this, the surprise is the extent of such losses. It tends to be much more than most people realize.
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hOW do we indentify constraints and list down the ways one can overcome them.
ReplyDeletewithout going into much details, just walk down your shopfloor and see where is the longest queue of work waiting to be processed
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