Which control chart would you use to track rejections in a maintenance projeg when bug arrival pattern is not constant?

P chart is the control chart that is used to monitor the rejection or acceptance whenever the bug arrival in pattern is not constant.

Explanation:

In case of only two possible outcomes, such as yes or no, accept or reject, P chart is used as control chart to track rejections. It is used to track rejections whenever the pattern of rejection is not constant. In this type of charts we collect the information from last few days to analyze and predict the next data to track rejections.

For example:

If we want to know that, in admission department of the university, how many students arrives to take admission in university, does not meet the qualification criteria each week. In this case there are only two options available either they meet criteria or not. In this case we use P chart with the help of previous week data to analyze the no. of students who are meeting qualification criteria in this week.