With poor accuracy control . . . various stages of production can be churning out ‘on time’ (but dimensionally varying) intermediate products. Every process is indeed meeting its schedule, and everyone is happy. Then when it comes to final assembly (late in the programme), all of a sudden things just don’t fit together and all sorts of time-consuming, handcrafted rework must be done. There goes the schedule.
- Rand Report - Monitoring the Progress of Shipbuilding Programme, MG 23.
Possessing a 1.0 measure on CPI and SPI is necessary but not sufficient for program success. Delivering all the parts on time and on schedule is necessary but not sufficient for project success.
For project success all the moving parts have to come together with the correct behaviors at the right time and with the right cost.
In the end ALL the pieces of the product have to both come together as individual pieces and come together as a system for the project to be successful. This appears to be obvious, but seems to be harder than it looks.
How can we "see" into how these pieces all come together - an Integrated Master Plan and Integrated Master Schedule.
