APICS CPIM-Part-2 Practice Exam Questions & Answers

The percentage of defective parts is the proportion of units that do not meet the specification limits. The process capability index (Cpk) is a measure of how well the process can produce within the specification limits.Both the percentage of defective parts and the Cpk depend on the specification range and the process variation1.

If the supplier changes the tolerance range from + 0.3 mm to + 0.5 mm, the specification range becomes wider, which means that more units will fall within the specification limits and fewer units will be defective. Therefore, the percentage of defective parts decreases.

However, if the process variation remains unchanged, the Cpk will decrease, because Cpk is inversely proportional to the specification range2. A wider specification range means a lower Cpk, which indicates a lower process capability.A lower Cpk also implies a higher percentage of defective parts in relation to the process variation3.

Therefore, the correct answer is D. The percentage of defective parts decreases, and the process capability index decreases.

Understanding Process Capability Index (Cpk) [With Calculator]

[Process Capability Index - an overview | ScienceDirect Topics]

Converting A Capability Index to PPM Defective - Accendo Reliability

Maintenance, repair, and operating (MRO) supply systems are systems that manage the inventory and procurement of the items that are used to support the production process, but are not part of the final product. MRO items include spare parts, tools, lubricants, cleaning supplies, safety equipment, and office supplies. The primary consideration in MRO supply systems typically is stockout costs. Stockout costs are the costs associated with the inability to meet the demand for an item due to insufficient inventory. Stockout costs can include lost sales, customer dissatisfaction, production downtime, emergency orders, and reputation damage. Stockout costs can be very high for MRO items, especially if they are critical for the operation and maintenance of the production equipment. Therefore, MRO supply systems should aim to minimize the risk of stockouts by ensuring adequate availability and accessibility of MRO items.

The information about the consistent overage in actual run time for one operation should be sent first to the engineering manager to evaluate the run time for the routing. A routing is a document that specifies the sequence of operations and work centers required to produce a product or feature. A run time is the amount of time needed to perform an operation or a task at a work center. An overage in actual run time means that the actual time spent on an operation or a task is more than the planned or standard time. This can result in lower efficiency, productivity, or quality, as well as higher costs, waste, or delays.

The engineering manager is responsible for designing and maintaining the routing and the run time for each operation or task. The engineering manager can evaluate the run time for the routing by comparing the actual and planned times, identifying the causes of the overage, and taking corrective actions. For example, the engineering manager may:

Review the accuracy and validity of the planned or standard time, and update it if necessary.

Analyze the performance and capability of the machines, equipment, or labor involved in the operation or task, and improve them if needed.

Investigate the presence of any errors, defects, rework, or variability in the operation or task, and eliminate them if possible.

Implement lean production techniques, such as value stream mapping, waste reduction, or continuous improvement, to optimize the operation or task.

The other options are not appropriate for sending the information about the consistent overage in actual run time for one operation first. The product manager is not responsible for designing or maintaining the routing or the run time for each operation or task. The product manager is responsible for managing and marketing the product or feature, such as defining its specifications, features, price, or promotion. Increasing the selling price of the product is not a solution for addressing the overage in actual run time, as it may reduce customer demand or satisfaction, as well as increase competition. The quality manager is not responsible for designing or maintaining the routing or the run time for each operation or task. The quality manager is responsible for ensuring and improving the quality of the product or feature, such as setting quality standards, implementing quality control methods, or conducting quality audits. Adding a new quality measurement to the operation is not a solution for addressing the overage in actual run time, as it may increase complexity or cost without improving efficiency or productivity. The production supervisor is not responsible for designing or maintaining the routing or the run time for each operation or task. The production supervisor is responsible for overseeing and coordinating the production activities at a work center, such as scheduling operations, assigning resources, monitoring performance, or resolving issues. Reviewing and explaining the overage in actual run time is not a solution for addressing it, as it does not identify or eliminate its causes.

According to the CPIM Exam Content Manual, a make-or-buy decision is a strategic decision that involves choosing between manufacturing a product or service internally or purchasing it from an external supplier1.A make-or-buy decision is based on a cost-benefit analysis that considers various factors, such as quality, cost, capacity, lead time, technology, and competitive advantage2.

Some of the potential reasons to make instead of buy a product may include:

Maintain quality: Making a product internally may allow the firm to control and ensure the quality standards of the product, which may affect customer satisfaction and loyalty.Buying a product from an external supplier may involve quality risks or uncertainties, especially if the supplier is located in a different country or has different quality systems3.

Reduce cost: Making a product internally may reduce the total cost of ownership of the product, which includes not only the purchase price, but also the costs of transportation, inventory, inspection, warranty, and maintenance. Buying a product from an external supplier may incur higher total costs due to these factors.

Keep confidential processes within the firm: Making a product internally may protect the firm's proprietary or confidential processes that give it a competitive edge in the market. Buying a product from an external supplier may expose the firm's processes to potential imitation or leakage.

Therefore, the correct answer is C. maintain quality, reduce cost, and keep confidential processes within the firm.

CPIM Exam Content Manual

Make-or-Buy Decision Explained: How to Make Outsourcing Decisions

Make or Buy Decision - What Is It, Examples, Factors, Advantages

Make-or-Buy Decision - Overview, How It Works, Triggers

Make or Buy Decision - Definition & Examples | Marketing Tutor

Scrap allowance is a percentage or quantity of material that is expected to be lost or wasted during the production process. Scrap allowance is usually applied to the component items in a bill of materials (BOM), which is a document that lists the materials, quantities, and relationships required to produce an end item. An increase in the scrap allowance in an assembled item will result in replanning of the component items in material requirements planning (MRP), which is a system that calculates the timing and quantity of materials and resources needed to meet the production plan. Replanning of the component items in MRP means that the system will adjust the planned order releases, order quantities, and due dates of the component items to account for the increased scrap allowance. Replanning of the component items in MRP will ensure that enough material is available to meet the demand for the assembled item, and to avoid shortages or excess inventory.

Manufacturing flexibility can be measured by using changeover time.Changeover time is the time it takes to go from the last good part of one product run to the first good part of the next product run1.Manufacturing flexibility is the ability of a system to handle a range of products or variants with fast setups2.By using changeover time as a measure of manufacturing flexibility, we can assess how quickly and efficiently a system can switch from one product to another, and how well it can respond to changes in customer demand, product mix, quality standards, and delivery schedules3.

Some of the benefits of reducing changeover time and increasing manufacturing flexibility are4:

Lower manufacturing costs: More value-added capacity can be unlocked because the equipment is idle for less time.

Higher customer satisfaction: Customers can get their products faster and with more variety.

Greater competitive advantage: The system can adapt to market changes and offer more customized products or services.

Improved quality and productivity: The system can avoid defects, waste, and errors that may occur during long or complex changeovers.

Some of the methods or tools that can help reduce changeover time and increase manufacturing flexibility are5:

Single-minute exchange of die (SMED): A technique that aims to reduce changeover time to less than 10 minutes by converting internal setup activities (those that can only be done when the machine is stopped) to external setup activities (those that can be done while the machine is running), and streamlining both types of activities.

Total productive maintenance (TPM): A technique that involves maintaining and improving the equipment performance and reliability by involving all employees in preventive maintenance, autonomous maintenance, focused improvement, and quality management.

Quick response manufacturing (QRM): A technique that focuses on reducing lead times throughout the entire organization by applying the principles of time-based competition, cellular manufacturing, system dynamics, and enterprise-wide application.

Therefore, changeover time is a measure that can be used to evaluate the manufacturing flexibility of a system.

Load variability is the fluctuation in electricity demand over time. It is influenced by factors such as weather conditions, time of day, day of the week, and various external events.The higher the load variability, the more challenging it becomes to accurately predict demand and plan capacity1.

A technique to manage load variability would be to plan additional safety capacity as a part of total available capacity to meet unplanned demand. Safety capacity is the act of consistently planning your production below capacity.The reason for this is so the company can become more flexible and responsive to the changing needs of the customer2. For example, if your company was operating at full capacity and your best customer needed extra product, you would be unable to meet their request. By allowing for safety capacity, your company can become more flexible and more responsive.

The other options are not techniques to manage load variability, because they are either irrelevant or ineffective. Applying capacity planning using overall factors (CPOF) to identify priority items at the work center is a simple approach to capacity planning that applies historical ratios.These ratios are based on the master production schedule along with established production standards3. However, this method does not account for load variability or unexpected changes in demand or supply. Designing the shop floor with machines that sit idle until additional demand requires their use is a wasteful and costly way of managing load variability.It does not optimize the utilization of resources or minimize the inventory costs4. Using capacity bills to provide a rough-cut method of planning total-time-per-unit value is a procedure based on the manufacturing production schedule (MPS).It indicates the total standard time required to produce one end product in each work center required in its manufacture5. However, this method does not address the fluctuations in demand or supply that may occur due to load variability.