What is the difference between a Standard Work Combination Sheet and a Standard Work Sheet?

A Standard Work Sheet shows the overall layout and flow of work at a station (floor plan, sequence, WIP). A Standard Work Combination Sheet focuses specifically on the timing and sequence of manual, machine, and walk elements within a single cycle, showing how they overlap on a timeline.

How does Yamazo Studio generate Standard Work Combination Sheets?

Yamazo Studio uses multi-track video analysis to capture manual, machine, walk, and wait times simultaneously. When you tag work elements in the video, the software automatically generates the WCS with accurate timing and a Gantt chart visualization showing parallel activities.

Why is the WCS important for multi-machine operation?

When an operator manages multiple machines, the WCS reveals the exact timing windows available during machine auto-cycles. This helps determine the optimal number of machines one operator can handle while staying within takt time.

What is the difference between a Standard Work Combination Sheet and a Yamazumi chart?

A Standard Work Combination Sheet maps the timing and overlap of manual, machine and walk elements for one operator within a single cycle. A Yamazumi chart stacks the total work content of several operators or stations as bars against takt time to balance the line. Use the WCS to detail one operator's cycle and the Yamazumi chart to balance work across many.

How is takt time shown on a Standard Work Combination Sheet?

Takt time is drawn as a vertical line on the timeline. If the operator's combined manual, machine-tending and walking time crosses that line, the cycle is over takt and must be rebalanced or have waste removed; finishing before the line leaves available time that can absorb more work.

Can you create a Standard Work Combination Sheet in Excel?

Yes — a basic sheet can be built in a spreadsheet by plotting each element's start and duration as horizontal bars, but keeping the timing accurate by hand is tedious and error-prone. Yamazo Studio generates the sheet directly from production video, so the manual, machine and walk times reflect what actually happened rather than estimates.

Glossary

Standard Work Combination Sheet (WCS) | Definition & Template

A Standard Work Combination Sheet (WCS), also known as a Work Combination Table or Standardarbeits-Kombinationsblatt, is a lean manufacturing document that shows the sequence and timing of manual work, machine work, and walking for a single operator at a workstation. It uses a Gantt-style timeline to visualize how human and machine activities overlap, making it essential for understanding and optimizing the interaction between operators and automated equipment.

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ManualMachineWalk

A Standard Work Combination Sheet: manual, machine and walk time on one timeline, showing where operator and machine overlap within the takt.

How to Create

To create a Standard Work Combination Sheet: (1) Observe and record the complete work cycle at the station. (2) List each work element in sequence. (3) Classify each element as Manual (operator hands-on), Machine (automatic cycle), Walk (operator movement), or Wait. (4) Measure the time for each element. (5) Plot the elements on a horizontal timeline showing their sequence and overlap. (6) Identify opportunities to reduce wait time by reorganizing work elements or adjusting machine cycles. Tools like Yamazo Studio generate WCS documents automatically from video analysis with multi-track support. By convention the timeline uses a distinct line style for each element type — a solid line for manual work, a dashed line for automatic machine time, and a wavy line for walking — so the overlap between operator and machine is visible at a glance.

Example

An operator at a CNC machining station performs the following cycle: Load workpiece (12s manual), Start machine (2s manual), Machine cycle (45s automatic), During machine cycle: walk to inspection station and check previous part (30s walk + manual), Return and unload (15s manual + walk). The WCS shows that the 45-second machine cycle overlaps with the 30-second inspection task, and the operator has 15 seconds of available time that could be used for additional tasks.

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