Olaf, a senior operations manager, was assigned the task of implementing the control process for a particular production process. He first identified the performance objectives and in doing so, he identified the key results that were to be accomplished. Next, he set standards and measured the actual performance. He compared the results with the objectives and standards. Finally, as part of the corrective action step, he implemented , a practice that involved focusing attention on substantial differences between the actual and desired performances. Select one: a. economic order quantity O b. just-in-time scheduling 0 c. management by exception O d. breakeven analysis e. critical path method