The Essential Value Stream Mapping Metrics You Need to Know

What's the difference between Process time, Cycle time, Takt time, Waiting time, Value Added time, Lead time and all them other typical VSM measures?
In this video, I break down how to calculate the critical times and efficiencies that play a central role in this analysis. We dive into metrics such as process time, cycle time, and process cycle efficiency, showing you how to calculate these values accurately for your own operations.

We start by understanding the units of product in the process and explaining why it’s vital to select a single unit for the entire value stream. This helps in maintaining consistency across all stages of production. From there, I cover the different times that come up in a typical value stream map, such as process time, which tells you how long it takes to complete a task or process, and cycle time, which gives a more averaged-out view of how long it takes to produce one unit, factoring in downtime and other variables.

The key takeaway is learning how to use these metrics to evaluate your processes. We go through the calculations for things like total cycle time, inventory days, and the all-important process cycle efficiency. This efficiency metric tells you how much of the total lead time is actually spent adding value to the product versus waiting time or inventory handling. Understanding this ratio can guide your improvement efforts, helping you to focus on areas where you can reduce waste and improve flow.

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   • The Essential Value Stream Mapping Me...  

Chapter Titles
00:00 Introduction to VSM Calculations
03:31 Process Time Explained
05:03 Cycle Time vs. Process Time
07:00 Calculating Takt Time and Lead Time
09:36 Calculating Process Cycle Efficiency
12:47 Understanding Inventory Times and Buffers
15:01 How to Use VSM Data for Focused Improvements

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