Secondary Metric in a project is one that has to be kept constant or prevented from deterioration as it is an important process metric even though it is not the metric to be improved. Hence, the objective of the project is twofold
1. Improve the project CTQ or the primary metric
2. Keep the secondary metric constant
An application-oriented question on the topic along with responses can be seen below. The best answer was provided on 10th July 2019 by Natwar Lal.
Applause for the respondents- Mohamed Asif, Vastupal Vashisth, Manjula Pujar, Natwar Lal & Sharad Talvalkar