प्रबंधन में वास्तविक प्रदर्शन को मापने के लिए निम्नलिखित में से किस तकनीक का उपयोग किया जाता है?

Arrange the following stages of management response to a production error in the correct chronological sequence as per the organizational framework: A. Taking necessary corrective action B. Identifying the specific error in the process C. Comparing the production output to the planned standard D. Measuring the actual production output Choose the correct answer from the options given below:

A manager compares actual sales with targets and then investigates the reasons for deviation before taking corrective steps. Which managerial function is being performed in this situation?