Ask "Why" Five Times

Ask "Why" a problem is occurring and then ask
 "Why" four more times.
For example...
1. Why has the machine stopped?
A fuse blew because of an overload

2. Why was there an overload?
there wasn't enough lubrication for the bearings

3. Why wasn't there enough lubrication?
The pump wasn't pumping enough

4. Why wasn't lubricant being pumped?
The pump shaft was vibrating as a result of abrasion

5. Why was there abrasion?
There was no filter, allowing chips of material into the pump


Installation of a filter solves the problem.

The Six Universal Questions

Idea Generators should be aware of a simple universal truth. There are only six questions that one human can ask another:

What? Where? When? How? Why? Who?

You may want to draw a mind map of the problem with these six words as nodes on the map.

                     What                    Where

                          \                 /                   

                            \              /                   

                              \           /       

            When -------------- Problem: --------------  How

                               /         \

                              /           \

                             /             \

                           Why             Who