The Standard Work Combination Table is a Lean work-design tool used to visualize how manual work, machine time, and walking fit together within a work cycle.
It helps teams understand whether the proposed work sequence can be completed within takt time.
The tool is especially useful when operators interact with machines that continue running while the operator performs other work.
What the table shows
A Standard Work Combination Table typically shows:
- work elements;
- manual time;
- automatic machine time;
- walking time;
- sequence;
- total cycle;
- takt-time reference.
The visual timeline helps the team see overlap.
For example, while Machine A runs automatically, the operator may unload Machine B or inspect another part.
Why the tool matters
A simple list of element times does not always show how work interacts.
Ten seconds of machine time does not necessarily require ten seconds of operator attention.
The Standard Work Combination Table separates the types of time so the team can design the sequence more intelligently.
Start with actual observation
The table should be based on observed work.
Use Standard Work principles:
- observe the real sequence;
- measure repeatable elements;
- understand normal conditions;
- identify walking and waiting.
Estimated work design can hide practical constraints.
Compare the sequence with takt
Takt Time defines the required production pace.
The designed work cycle should fit within takt under normal conditions.
If the operator cycle consistently exceeds takt, the line cannot reliably meet demand without overtime, extra labor, or hidden shortcuts.
Use machine time intelligently
Automatic machine time can create useful opportunity.
If the operator stands and waits while a machine runs, ask whether another safe and practical activity can be completed during that period.
The objective is not to keep the operator busy at every second.
The objective is a safe, repeatable, balanced sequence.
Connect with Yamazumi
A Yamazumi Chart shows how work content is distributed across operators or stations.
The Standard Work Combination Table goes deeper into the detailed timing and interaction within one operator’s cycle.
The tools complement each other.
Do not hide waste inside the table
Walking, searching, waiting, and awkward handling should not simply be standardized.
Challenge them.
A Spaghetti Diagram can help identify unnecessary travel before the future Standard Work is finalized.
Common mistakes
Using estimated times, ignoring walking, assuming all machine time requires operator attendance, designing a cycle exactly equal to takt with no realistic allowance for variation, and standardizing obvious waste are common errors.
Practical sequence
- Define takt time.
- Observe the current work.
- Break the job into work elements.
- Measure manual, machine, and walking time.
- Plot the sequence.
- Identify possible overlap.
- Remove unnecessary motion and waiting.
- Verify the cycle against takt.
- Test the proposed sequence.
- Incorporate the final design into Standard Work.
The practical lesson
The Standard Work Combination Table helps teams see time as a coordinated sequence, not just a list of task durations.
That makes operator-machine work easier to balance and standardize.