WTTT Technique

WTTT 5cmThe WTTT process is a method used to collect, record and analyse information about a task at a basic level to help understand task steps, identify likely error traps and discuss how the operator might typically deal with them.


This affords a greater understanding of how the job is actually done and provides an opportunity to make changes to improve Human Performance.

WHO WOULD CONDUCT A WTTT? Any Team member can conduct and lead the WTTT and it must be completed in collaboration with the person(s) who usually conduct the operational Task.


Review HPOG WTTT Guidance : Provided as a handy prompt sheet to aid the process.

FREE 'HP For All' eLearning : Refresh on the Topic 'Understanding Why', in particular the notes on 'work-as-imagined vs work-as-done'. 

Read Human Factors Briefing Note No.11 : Published by the Energy Institute, provides a detailed overview of advanced Task Analysis. 


Use the HPOG WTTT Template : Available as Workpack containing guidance and an editable MS Word file template, ideally completed on site and finalised as an electronic document. (Note: this will download to your designated folder - check the bottom left of your browser).

1. Conduct a Walk-Through Talk-Through at the worksite, one task at a time with operational personnel that are competent to undertake the task being analysed.

2. Identify the key steps in a task, discuss what can go wrong with each step, and under what conditions mistakes are more likely. If possible, take photos.

3. Discuss how errors or confusing situations would typically be dealt with.

4. Document your findings and any images in the WTTT Template.

5. Review findings and make recommendations for improvement where applicable through the usual channels.

"The walk-through talk-through is a simple process which consists of an experienced person demonstrating how the task is carried out. Each step, no matter how minor (pressing a switch) or effortful (walking to the other end of the premises to collect a tool), is demonstrated. This includes communicating with other people, retrieving information from computers or display systems and making decisions on information retrieved."