Unit 3: Controlling and Operations

Answer: A — The correct answer is A because a just-in-time (JIT) inventory system is designed to minimize inventory levels, reduce waste, and optimize production. By implementing a JIT system, the company can expect to reduce its inventory costs and improve its cash flow. The other options are incorrect because while a JIT system may have some indirect benefits on production capacity, product quality, and supply chain management, these are not its primary benefits. Option B is incorrect because JIT is focused on inventory management, not production capacity. Option C is incorrect because while improved inventory management may lead to better product quality, this is not the primary benefit of a JIT system. Option D is incorrect because a JIT system is designed to reduce transportation costs, not increase them.

Answer: A — The correct answer is A. The control process follows a logical sequence: establish standards, measure performance, compare actual to standard (identify variance), and then investigate the cause before implementing corrective action. A manager must understand WHY wait times increased (staff shortage, equipment failure, increased volume, inefficient processes) before taking action, as different causes require different solutions. Option B is premature because hiring may not address the actual problem—the issue could be poor scheduling or workflow inefficiency rather than insufficient staff. Option C avoids the problem rather than solving it. Option D ignores a significant 15-minute increase that likely indicates a real operational problem requiring management attention. The key principle being tested is that effective control requires diagnosis before action.

Answer: B — The correct answer is B because it demonstrates proper variance analysis and control principles. A manager must distinguish between variances that are controllable and those that are not. The material price variance (8%) resulted from external market forces beyond management's control, so while it should be monitored and understood, it may not require corrective action in the traditional sense. However, the labor efficiency variance (10%) is controllable and warrants investigation and corrective action, such as extending training periods, adjusting work processes, or reassigning personnel. Option A is incorrect because revising standards downward to match actual performance defeats the purpose of standards as performance benchmarks and removes accountability. Option C is too reactive and broad—blanket cost-cutting without identifying root causes can harm operations and employee morale. Option D is incorrect because it abandons the control function entirely; even uncontrollable variances should be monitored and understood for planning purposes. Effective control requires distinguishing between controllable and uncontrollable variances and responding appropriately to each.

Answer: A — The correct answer is A because this scenario presents a classic control problem where actual performance consistently exceeds the standard (44-48 bugs vs. 35-bug standard), indicating a systemic issue rather than random variation. Root cause analysis is the appropriate control mechanism to identify why the process is failing—whether it's inadequate testing procedures, unclear coding standards, insufficient training, or flawed development methodology. This investigative approach addresses the underlying problem. Option B is incorrect because adjusting standards downward to match poor performance violates the fundamental purpose of control systems; standards should drive improvement, not be modified to accommodate failure. Option C is premature and counterproductive—poor performance may reflect process design problems, not personnel competence, and replacing the team without understanding root causes will likely perpetuate the same issues. Option D is incorrect because continuing to monitor without taking corrective action wastes time and resources; consistent deviation indicates a systematic problem requiring immediate investigation, not passive observation. The correct controlling function requires identifying what is causing the deviation and implementing corrective measures.

Answer: C — The correct answer is C because identifying the root cause of the problem is the first step in controlling operations and addressing the defect rate issue. This allows the manager to develop an effective solution. Option A is incorrect because training may not address the underlying issue. Option B is incorrect because market analysis is not directly related to the defect rate problem. Option D is incorrect because increasing production without addressing the defect rate issue may exacerbate the problem.