Operations-Management Practice Questions

Kanban is a signaling device used in a pull system to authorize the production or movement of a specific quantity of items. When a downstream workstation consumes a container of parts, it sends the empty container and its associated kanban card back to the upstream workstation. This signal "pulls" the production of the exact quantity needed to replenish what was used, preventing overproduction and ensuring production is directly tied to actual demand.

A. Kanban does not require work items to be the same size; it manages the flow of containers, which hold a specified quantity of items.

C. Kanban is a core component of production systems in manufacturing and other industries, not a process limited to support or maintenance activities.

D. Kanban is an internal workflow management tool used to control production, not a method for benchmarking or highlighting organizational performance against others.

1. Hopp, W. J., & Spearman, M. L. (2004). To pull or not to pull: what is the question? Manufacturing & Service Operations Management, 6(2), 133-148. The article explains that a kanban system is a classic pull mechanism where a "card authorizes production of a standard container of parts" (p. 134). https://doi.org/10.1287/msom.1030.0028

2. MIT OpenCourseWare. (2005). 15.762J / ESD.265J / 1.265J Supply Chain Planning, Lecture 10: Just-in-Time Systems. The lecture notes describe Kanban as a "signal to produce a specified quantity of a specific part" which is fundamental to the pull mechanism (Slide 10-12).

A chase aggregate plan, also known as a demand matching strategy, adjusts production rates to match demand in each period. This is achieved by varying workforce levels or production hours. This strategy is preferable for custom, one-of-a-kind, or highly perishable products because it minimizes or eliminates finished goods inventory. Holding inventory of such items is impractical, impossible, or too costly due to spoilage, obsolescence, or the inability to predict specific customer requirements.

A. A level aggregate plan: This strategy maintains a constant production rate, using inventory to buffer demand fluctuations, which is unsuitable for custom or perishable goods.

C. A hybrid aggregate plan: While a hybrid plan might be used, the pure chase strategy is the most direct and preferable approach for the specific product types mentioned.

D. A modified sales and operations plan: Sales and Operations Planning (S&OP) is the process that creates an aggregate plan; it is not a type of plan itself.

1. Jacobs, F. R., & Chase, R. B. (2018). Operations and Supply Chain Management (15th ed.). McGraw-Hill Education. In Chapter 14, "Sales and Operations Planning," the text explains that a chase strategy is ideal for make-to-order firms or those with perishable goods, as inventory cannot be stockpiled.

2. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 13, "Aggregate Planning and S&OP," contrasts the chase strategy (minimizing inventory) with the level strategy (using inventory), noting the chase approach is common in service organizations and for certain product types.

For service-based companies, location decisions are critical and often driven by customer access. Since services are typically produced and consumed simultaneously, proximity to the target market is a primary factor to ensure convenience, attract customers, and maximize revenue. Unlike manufacturing, which may prioritize supply chain or labor costs, services thrive on being accessible to their clientele. This direct interaction model makes customer proximity a key strategic consideration in location analysis.

A. Relations with community: While important for long-term success, this is a qualitative factor and generally secondary to direct customer access for revenue generation.

B. Best operation level: This is a concept related to capacity planning and economies of scale, not a factor for choosing a physical location.

C. Effective capacity: This is a measurement of a facility's potential output under normal conditions, determined after a location has already been chosen.

1. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. In Chapter 8, "Location Strategies," the text emphasizes that for service firms, "location decisions are closely tied to market selection... proximity to customers is the primary location factor" (p. 343).

2. Stevenson, W. J. (2021). Operations Management (14th ed.). McGraw-Hill. Chapter 8, "Location Planning and Analysis," states, "For service organizations... a primary consideration is customer access. It is a truism that the best location is the one that provides the optimal customer access" (p. 361).

Two of the most widely recognized drawbacks of ERP implementation are the significant time and resources required. These projects are lengthy, often taking years to fully implement, and the financial and operational benefits are typically not realized until well after the system goes live (A). Furthermore, ERP systems fundamentally change how work is done, requiring comprehensive and often complex training for employees across the organization to ensure they can use the new, integrated system effectively (B).

C. The cost savings and/or payback is impossible to measure in terms of bottom line: While measuring ERP ROI can be complex, it is not impossible; companies use various financial and operational metrics to assess payback.

D. It must always be customized and too much customization may slow down projects: ERP systems do not always require customization; a common strategy is to adapt business processes to the software's standard "best practices."

1. Davenport, T. H. (1998). Putting the Enterprise into the Enterprise System. Harvard Business Review, 76(4), 121–131. This foundational article highlights that ERP projects are long, expensive, and require significant organizational change, including extensive training.

2. Umble, E. J., Haft, R. R., & Umble, M. M. (2003). Enterprise resource planning: Implementation procedures and critical success factors. European Journal of Operational Research, 146(2), 241-257. https://doi.org/10.1016/S0377-2217(02)00547-7. The paper identifies high costs, long implementation times, and the need for extensive user training as major challenges (Section 3.2).

The company needs to increase its production capacity rapidly to meet a sudden surge in demand, compounded by labor and inventory shortages. Hiring temporary workers (A) is a fast, flexible way to augment the workforce without the long-term commitment and training time of permanent staff. Subcontracting (C) allows the company to immediately leverage the existing capacity of another firm, providing a very quick way to increase output without internal capital investment. Both are standard short-term tactics for managing capacity constraints.

B. Building new facilities is a long-term strategic decision that takes years and is not a rapid solution.

D. Hiring and training new full-time employees is a slower process than hiring temporary workers or subcontracting.

1. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 7, Section "Capacity and Constraint Management," lists tactics for matching capacity to demand, identifying subcontracting and use of part-time/temporary workers as short-term options.

2. Stevenson, W. J. (2021). Operations Management (14th ed.). McGraw-Hill Education. Chapter 11, Section "Dealing with Variations," outlines demand and capacity options. Capacity options include hiring temporary workers and subcontracting as common methods to handle peak demand periods.

3. MIT OpenCourseWare. (2016). 15.762 Supply Chain Planning, Fall 2016. Lecture 2: Aggregate Planning. The lecture materials discuss various levers for managing supply and demand, categorizing subcontracting and temporary labor as short-term supply-side levers.

The Supply Chain Operations Reference (SCOR) model is a management tool used to address, improve, and communicate supply chain management decisions. It is structured around five primary management processes (Plan, Source, Make, Deliver, Return). To measure the performance of these processes, the SCOR model uses five performance attributes: Reliability, Responsiveness, Agility, Cost, and Asset Management Efficiency. These attributes directly correspond to the perspectives of reliability, flexibility (covered by Responsiveness and Agility), expenses (Cost), and assets/utilization (Asset Management Efficiency) mentioned in the question.

B. RFEAU: This is an acronym derived from the question's keywords, not a recognized supply chain management model.

C. SCAM (Supply Chain Accreditation Model): This is not a standard or widely accepted framework in supply chain management literature.

D. SCM (Supply Chain Metrics): This is a general term for any metric used in supply chain management, not a specific, structured model like SCOR.

1. ASCM (Association for Supply Chain Management). (2022). SCOR Digital Standard. The official standard defines the performance attributes as Reliability, Responsiveness, Agility, Cost, and Asset Management. Section 3.2, "SCOR Performance," details these attributes.

2. Lockamy III, A., & McCormack, K. (2004). The development of a supply chain management process maturity model using the concepts of business process orientation. Supply Chain Management: An International Journal, 9(4), 272-278. https://doi.org/10.1108/13598540410550019. This article discusses the SCOR model's framework and its performance attributes for evaluating supply chains.

Vertical integration is the degree to which a firm owns its upstream suppliers and its downstream buyers. It is a corporate strategy where a company owns or controls its suppliers, distributors, or retail locations to control its value or supply chain. A high degree of vertical integration means the manufacturer owns and operates a significant portion of the supply chain, from raw materials to final distribution.

B. Horizontal integration involves acquiring competitors at the same level of the supply chain, not owning different stages of it.

C. Insource integration is not a standard industry term; insourcing is the act of bringing a process in-house, a component of vertical integration.

D. Outsource integration is not a standard term; outsourcing is the opposite of owning and operating a supply chain function.

1. Harrigan, K. R. (1985). Vertical Integration and Corporate Strategy. Academy of Management Journal, 28(2), 397–425. https://doi.org/10.2307/256208. This paper defines and analyzes vertical integration as a key corporate strategy related to supply chain ownership.

2. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 11, "Supply Chain Management," defines vertical integration as developing the ability to produce goods or services previously purchased (p. 445).

3. Stanford Graduate School of Business. (n.d.). Vertical Integration. Stanford Business Glossary. Defines vertical integration as "The merger of companies that are in the same business but in different stages of production or distribution."

The fundamental difference lies in how production is initiated. A "push" system schedules production in anticipation of future demand, based on forecasts. This approach moves products forward through the system, often leading to higher inventory levels. In contrast, a "pull" system initiates production only in response to actual downstream demand (a "pull" signal). This reactive approach is designed to minimize inventory at all stages of the supply chain, thereby eliminating the waste associated with excessive stock.

B. Overproduction in a push system increases costs related to holding inventory, storage, and potential obsolescence; it does not lower costs.

C. Pull systems are concerned with managing the production flow of existing products, not the process of developing additional or new products.

E. The choice between push and pull systems is an operational strategy and does not inherently enhance or detract from employee relations.

F. Quality control is a distinct function present in both systems; a pull system may expose quality issues faster but does not initiate the quality process itself.

1. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 16 defines a pull system as one that "pulls a unit to where it is needed just as it is needed," contrasting it with a push system that "pushes" material based on schedules (p. 660). It explicitly links pull systems to inventory reduction.

2. Simchi-Levi, D., Kaminsky, P., & Simchi-Levi, E. (2008). Designing and Managing the Supply Chain: Concepts, Strategies, and Case Studies (3rd ed.). McGraw-Hill. Chapter 6 contrasts the two systems, stating, "In a push-based supply chain, production decisions are based on long-term forecasts," while "in a pull-based supply chain, production is demand-driven" and leads to "reduced lead times, and reduced inventory levels" (pp. 130-131).

A control chart is a graph used in statistical process control (SPC) to monitor how a process changes over time. It plots data points in sequence with a central line for the average, an upper control limit, and a lower control limit. This allows for the continuous monitoring of a process's current status and its end result (output) to determine if it is stable and within statistical control.

A. Checklist: A checklist is a simple data collection tool to ensure steps are followed or items are present; it does not monitor a process's statistical behavior.

B. Flowchart: A flowchart is a diagram that illustrates the sequence of steps in a process; it describes the process but does not measure or monitor its performance.

D. Scatter diagram: A scatter diagram investigates the relationship between two different variables, not the status of a single process over time.

1. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 6, "Managing Quality," Section on "Statistical Process Control (SPC)."

2. MIT OpenCourseWare. (2016). 15.762 Supply Chain Planning, Lecture 10: Statistical Process Control. Massachusetts Institute of Technology. Slide 11 describes the purpose and structure of control charts for monitoring processes.

3. Montgomery, D. C. (2013). Introduction to Statistical Quality Control (7th ed.). Wiley. Chapter 6, "Control Charts for Variables," introduces control charts as the primary tool for process monitoring.

Job enrichment is a work design strategy that aims to increase worker motivation and satisfaction by enhancing a job's depth. It involves giving employees more responsibility, autonomy, and control over their work. This is achieved by incorporating tasks typically reserved for managers, such as planning, scheduling, and controlling their own work, which directly addresses the elements described in the question. This "vertical loading" of the job helps to minimize the monotony and repetitiveness of tasks by making the work more meaningful and challenging.

A. Job entitlement is an employee's belief that they are owed certain benefits or rewards, not a system for designing work.

C. Job rotation involves moving employees between different jobs of similar skill levels ("horizontal loading") to reduce boredom but does not typically add planning or scheduling responsibilities.

D. Job rating, or job evaluation, is a process used to determine the relative worth of jobs for compensation purposes, not to design the content of the work itself.

1. Heizer, J., Render, B., & Munson, C. (2020). Operations Management: Sustainability and Supply Chain Management (13th ed.). Pearson. Chapter 10, "Human Resources, Job Design, and Work Measurement," distinguishes job enrichment (vertical expansion) from job enlargement (horizontal expansion) and job rotation (p. 411).

2. Stevenson, W. J. (2021). Operations Management (14th ed.). McGraw-Hill. Chapter 7, "Work Design and Measurement," Section 7.1, "Job Design," describes job enrichment as increasing employee responsibility for planning and coordination.

3. Hackman, J. R., & Oldham, G. R. (1976). Motivation through the design of work: Test of a theory. Organizational Behavior and Human Performance, 16(2), 250-279. https://doi.org/10.1016/0030-5073(76)90016-7. This foundational paper on the Job Characteristics Model explains how factors like autonomy (planning/scheduling) enrich jobs.