Data Box

Topic
Value Stream Mapping (VSM)

Summary
The Data Boxes have the typical measurements that most companies use when undertaking process improvement measures to develop your unique value stream process.

Objectives
Data Boxes standardize information gathering and keep the user focused on accurate collection.

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Summary of Steps

1. At the top, mark name of the process, the number of operators, and a sketch of the action or thing concerned
2. Operator cycle time (OCT)
   • Actual operator hands on time
3. Machine cycle time (MCT)
   • Machine process time not including changeover
4. Value-added time (VAT)
   • Time that the part or product is actually changing form
5. Changeover time (C/O)
   • Time from the last good part of the previous run to first good part of the new run
6. Quality
   • Percentage of defects including scrap
7. Productivity
   • Products per person per hour
8. Total space
   • Total foot print of the area including storage, machine, and work areas in square feet
9. Value-added space
   • Actual space where value-added activity occurs; usually about six inches greater than the actual product
10. Product travel
    • Total linear feet traveled by the product
11. Product flow
    • Push or pull?
12. Information flow
    • Physical hardcopies or electronic information?
13. Shifts
    1. Number of shifts used in the process
       • Used to determine available time:
         • Total time of a shift minus break and lunches
14. Inventory
    1. Current measurement of inventory before and after the process
       • For inventory between processes, count the inventory before the process so the inventory will not be double counted

Purchase

Included in:
VSM Training Package
VSM Office Workflow Training Package

Additional Resources
Lean Dictionary