DNA - Tampering Only Makes Things Worse

Tampering Demonstration

When is a process adjustment an improvement?

The Funnel Experiment is a interactive demonstration that any change without intimate knowledge of the process is tampering, and that tampering -- depending on intuition and common sense -- only makes things worse. We discusses the consequences of tampering and the manager's need for Profound Knowledge.

The "four rules of the Funnel" demonstrates the futility of making adjustments to a stable process in order to affect the next outcome. There are four common ways people make adjustments, each resulting in progressivily more variation.

Rule 1: Do not adjust
Rule 2: Opposite target by error amount
Rule 3: Opposite last drop by error from target
Rule 4: Opposite last drop by error from last drop

The Funnel Experiment is a participative demonstration of the results of the "four rules".

After the results from all four rules are displayed, the group can establish a monetary value for each rule. The implications to business are startling.