Poke-Yoke (Fail Safe) tries to change either the process or its resources, thus eliminating the need to rely on human experience and knowledge. Examples include:

Suppose company manufactures paint from a base color and adds tints to arrive at the final color. Suppose there are 10 tints and a final color is made by mixing any three of them with the base. There are 70 possible colors (10*9*8=720). Forecasting and planning production for 720 items is a difficult task. It is much easier if:

Qualitative techniques are productions based on judgment, intuition, and informed opinions.

The formula to calculate the Inventory turns is:

What uses cost determined before production begins?