Standard Work

Three Elements

TAKT Time

TAKT Time = Time Available ÷ Customer Demand

Work Sequence

The order of operations in which a worker carries objects, mounts them on machines, and removes them, etc. This should be distinguished by the “Processing Sequence” according to which a product is made.

Standard Work-In-Process< (W.I.P.)

Refers to the minimum W.I.P. needed to perform repetitive operations (parts mounted on machines, parts on conveyors, parts needing time to cure, etc.)

Takt Time

TAKT Time = Time Available ÷ Daily Customer Demand &multiply;

Time Available per Day:
One 8-Hr Shift = 480 min
2 Shifts per Day = 480 x 2 = 960 min
In Seconds = 960 x 60 = 57,600 sec

Sales per Day:
457 units.

Working to Takt Time is Fundamental to Lean Mfg

Work Sequence

1. Presents a physical layout of the machinery in the work area.
2. Indicates the order of operations and flow.
3. Defines the Standard W.I.P. allowable at each workstation.

W.I.P.

The Steps

1. Familiarise yourself with process and surroundings
2. Draw the process area layout
3. Break down each part of the process into simple steps
4. Write down the work elements
5. Show the work sequence
6. Measure individual work elements (at least 10 times)
7. Measure cycle-time (at least 10 times)
8. Complete the following forms/sheets
1. Time Observation Form
2. Standard Work Combination Sheet
3. Standard Work Sheet (Workstation Layout)
4. Takt Time V’s Actual Bar Chart (Entire process)

Time Observation Form – A Worked Example

Standard Work Combination Sheet – A worked Example

Standard Work Combination Sheet

Standard Work Layout – A Worked Example

Cycle Time Bar Chart

Cycle Time Bar Chart

Cycle Time Bar Chart

Cycle Time Bar Chart

Cycle Time Bar Chart