Standardized Work
Standardized work is one of the key components of a Just-in-Time production system.
In order to achieve a balanced work flow, cycle time equal to Takt time, and high quality, work must be standardized at all operations for optimum efficiency and consistency.
Standardized work is not equivalent to the typical American concept of production standards or efficiency standards within a standard cost system. Standardized work refers to the systematic determination and documentation of work element sequence and process for each operation.
The objective is to clearly communicate to the operator exactly how the job should be performed.
Variability - and the inefficiency that goes with it - is removed through scientific analysis of the operation, and by eliminating: "adjustment", searching for tools and parts, excess movements, double-handling, and awkward ergonomics.
The Standard Work Sheet
A Standard Work Sheet is developed for every operation, containing the following:
- Takt Time - the time required for producing a unit. This is equal to the time available per day divided by the number required per day.
- Work Sequence - the exact sequence and method for performing each element of work.
- Standard Inventory - the amount of in-process inventory that should be present at the workstation, including inventory mounted on machines.
The standard work sheet should be clearly documented and displayed at the workstation as a means of communicating to all operators and an element of Visual Control.
