Re: Time for "thinking before posting"
Thanks
Ok after value stream mapping where do you begin? We were taught to jump on bottle necks which ened up being symptomatic of other problems up the line...Is there a structured path for Lean?
The path really depends on your organization's Lean maturity.
You might want to start by gettign a couple of really good books on the subject - there is a mountain of information and this forum is probably best used to answer specific questions about specific issues or tool appliacations...
That said:
Ensuring that the organization really has a common set of goals and objectives and consenus on the strategy, metrics, timeframe etc. is essential.
Within this process the organization shodul identify a starting product or large function/service that is cumbersome and costly and really isn't getting the job done well...
You can then map the process*. Your consultant was correct that you start at the bottleneck (or constraint) of the process. However, the necessarry actions may not take place at the constraint as you pointed out. one must get to the root causes of the constraint. there are 8 wastes and they are inter related. One wase typically resutls in the other 7. Defects are the mother of all wastes.
One lean deployment that I worked on was a manufacturing process that had terrible cycle times, huge WIP, high cost, etc. The constraint was clearly teh Yield of the process. We went upstream to work on the casues of the poor yield. (This was a series of six sigma projects - the problems were fairly complex and variation based, not error based.) we didnt' too much traditional leaning since it wouldnt' have much effect at all given the yield problem. Once we had improved the Yields to a managable level, we imlemented Kanbans, single piece flow, cell layout, 5S and stop production. We then saw soem additionl incremental improvements in cycle time on top of the huge improvements in Quality and cycle time resulting from the Yield improvements. But the effect was minor as expected since the Yields were still the constraint. We did however, significantly reduce WIP and we were able to see the emerging problems thru SPC, stop production and our Kanbans with the reduced WIP. When somethign 'new' happened we saw it and were able to jump on it quickly and turn it around in a matter of weeks instead of quarters....