TWI Job Methods is one of the classic Training Within Industry programs.
Its purpose is to help supervisors improve how work is done by making better use of the people, machines, and materials already available.
The method encourages practical improvement without assuming that every problem requires major capital.
Break down the job
The first step is to record the job as it is currently performed.
Focus on the important details of the work rather than writing a vague summary.
The supervisor should understand:
- what is done;
- where it is done;
- when it is done;
- who does it;
- how it is done.
Standard Work provides a natural connection because improvement should eventually become the new best-known method.
Question every detail
Job Methods uses structured questioning to challenge the current method.
Ask:
- Why is this necessary?
- What is its purpose?
- Where should it be done?
- When should it be done?
- Who is best positioned to do it?
- How can it be done better?
The objective is not criticism of the person doing the job.
The objective is to challenge the method.
Develop the new method
Typical improvement directions include:
- eliminate unnecessary details;
- combine steps where practical;
- rearrange sequence;
- simplify the work.
This logic closely connects with ECRS: Eliminate, Combine, Rearrange, Simplify.
Use the people doing the work
Supervisors should involve employees who understand the job.
They may know:
- why a workaround exists;
- which material is difficult to handle;
- what causes delays;
- which sequence is safer;
- what varies by product.
Respect for People supports the principle that improvement should use employee knowledge rather than treat workers only as recipients of changes.
Test before standardizing
A proposed method should be tested.
Confirm effects on:
- safety;
- quality;
- time;
- ergonomics;
- workload;
- equipment;
- downstream processes.
If the method performs better, update the standard and communicate the change.
Get approval where needed
Some improvements affect engineering, quality, safety, tooling, or customer requirements.
The supervisor should understand what can be changed locally and what requires formal approval.
Improvement discipline includes respecting necessary controls.
Put the method to work
Implementation requires more than announcing a new method.
The supervisor may need to:
- update instructions;
- train employees;
- change layout;
- adjust tools;
- revise material presentation;
- confirm early performance.
TWI Job Instruction can help teach the revised method consistently.
Common mistakes
Improving around a poorly understood job, challenging the worker instead of the method, making changes without employee input, skipping safety or quality review, and failing to update the standard after a successful change are common mistakes.
Practical sequence
- break down the current job.
- list important details.
- question the purpose of each detail.
- challenge where, when, who, and how.
- eliminate unnecessary work.
- combine or rearrange where useful.
- simplify the remaining method.
- test the proposed change.
- obtain required approvals.
- standardize and teach the improved method.
The practical lesson
TWI Job Methods gives supervisors a repeatable way to improve work.
It turns everyday observation into disciplined method improvement without requiring a large project structure.