Manufacturing time is the time spend to manufacture the product. When also taking into account the failure rates, test slip and rework the resulting manufacturing time will increase.
Quotes
Recognizable are the questions of a supplier, when 100 products are ordered, if the first 95 can be delivered now and 5 later. Another questions often asked is if the product may be delivered but with a deviation of the required specification. Both are often caused by process failures during manufacturing.
Reduce delivery time
To overcome this and have a more predictable delivery time an upfront knowledge of what can happen can be found in the Value Stream Map created during the Manufacturing Part Quality analysis. When taking into account failure rates, test slip and rework actions a more realistic delivery time can be given. Solving those issues certainly helps but is not necessarely the most effective strategy. When taking into account the manufacturing lead time the processes which are not in the critical path can be “repaired” without a time penalty. However everything in the critical path is directly influencing the delivery time.
The created Value Stream Map gives together with the manufacturing lead time path also an opportunity to improve the delivery time.
- Changing the Design
- Improving processes in the critical path
- Adding more capacity in the critical path processes
- Logistical decoupling the parts in the critical path
- Pre order parts in critical path
- …..
The Value Stream Map gives the opportunity to “simulate” the proposed solution by doing a what if analyses where the new manufacturing time can be tested. When solved a new critical path becomes visible and can be solved by the before mentioned strategy.
Note: the logistics, delivery times and wait times are not taken into account. How to handle those is described in extensivly.