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About this lesson
The To-Be process map or value stream map is the proposed new process that has incorporated the flow improvements, five “S” changes, and Poka Yoke aspects at each step. This map is the plan for process change.
Exercise files
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To-Be Process Map Exercise.docx167.5 KB To-Be Process Map Solution.docx
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Quick reference
To-Be Value Stream
The To-Be process map or value stream map is the proposed new process that has incorporated the flow improvements, five “S” changes, and Poka Yoke aspects at each step. This map is the plan for process change.
When to use
The To-Be map is generated during the Improve phase. This map becomes the new process baseline for use during the Control phase of the Lean Six Sigma project.
Instructions
Start with the As-Is map and modify it to create the To-Be map. Incorporate changes in the flow design including the elimination of non-value-added steps. Revise the remaining steps to incorporate any Poka Yoke, Five S, or TAKT time changes to create new step designs. For the To-Be Value Stream Map, add the databoxes with the design goals for improvement in each of the databox metrics. As the new process is piloted and experience is gained, update the databox entries with actual performance metrics. This includes both cycle time metrics and quality improvement metrics on first-pass yield. Also, incorporate any changes to the flow that are associated with transitioning to a pull scheduling system.
When the map is first developed, targets are set for the databox values at each step. The targets for each step should be realistic. For instance, it is unlikely that you can eliminate all non-value-added time because of normal variation that exists in all processes. The target goals for improvement in each step are often based on the elimination of root causes and redesign to achieve benchmark performance levels. If there is no available benchmark, seek a “50%” improvement in the metric. During the design of improvements, targets are useful for design teams to both challenge them and to ensure they don’t waste time and effort striving for unattainable perfection.
Benchmarking
Benchmarking is a process that is used to establish “best-in-class” targets. Benchmarks can be established for product, process, or business performance metrics. The benchmarking process should include both a review of the existing product or process in addition to the benchmarked products or processes so as to determine the magnitude of the gap. The benchmarking approach normally includes a literature search to identify organizations or products that can be used when establishing the benchmarks. The means for collecting benchmark information can be through surveys or direct observation. This is often an iterative process as the identification of benchmarked products or processes will often lead to the need for deeper investigation. The attached flowchart represents a template for conducting a benchmarking study.
Hints & tips
- Don’t expect perfection in your To-Be map, but do expect significant improvement.
- Once the new process is in place, evaluate the pilot run performance and update the VSM databox metrics.
- The To-Be process may need to go through several stages as some improvements can be implemented with virtually no effort but others may require the purchase of new equipment or may depend on the implementation of other projects. An example would be an electronic Kanban system that speeds the handoff between steps but first requires the purchase and installation of software and scanners at each step in the process. The first To-Be map does not include the Kanban effect, but the ultimate map will include it.
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