In this step, you can define your own processes to estimate the share of defects. This applies to the following share estimates:

- Nonconforming units

- Characteristic values outside of the tolerance range

**Standard settings**

In the standard system, share estimates have been maintained for the following distributions:

- Binomial distribution

- Poisson distribution

- Normal distribution

The table has the **
delivery class** G. The following name range is reserved
for the user:

- Defect share estimation procedure 9*, A*, ... , Z*

**SAP Recommendation**

Use the function modules contained in the standard system.

**Activities**

1. Determine whether you need share
estimates other than those contained in the standard system.

2. Define the calculation rules and
program function modules for your own share estimation
procedures.