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WGU C720 Operations and Supply Chain Management 2026 | 500+ Q&A | Six Sigma, MRP, Capacity & Lean Systems

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This WGU C720 Operations and Supply Chain Management (2026) Complete OA Prep Guide contains over 500 structured exam-style questions and verified answers covering core operations management, quality systems, inventory control, forecasting, capacity planning, supply chain strategy, and process improvement frameworks. The material begins with foundational concepts such as inputs and outputs (page 1), sustainability, VIRAL competitive advantage (page 2), productivity calculations, and the six types of inventory including raw materials, WIP, finished goods, supplies, and pipeline inventory (pages 2–3). The guide provides comprehensive coverage of inventory systems including perpetual vs. periodic systems (pages 5–6), ABC analysis and Pareto principle (page 6), EOQ and EPQ models (page 7), safety stock, stockouts, quantity discounts, and transportation discounts. Quality management is examined in depth, including internal vs. external quality orientation (page 8), SERVQUAL dimensions (reliability, responsiveness, assurance, empathy, tangibles on page 9), product quality characteristics (performance, durability, conformance on page 10), and the philosophies of Crosby, Juran, Taguchi, Deming, and Ishikawa (pages 10–12). Statistical tools such as control charts, histograms, Pareto charts, scatter plots, SPC, and the PDCA cycle are thoroughly reviewed (pages 12–14). Extensive Six Sigma coverage includes DMAIC and DMADV frameworks (pages 14–17), value stream mapping, kaizen events, 5S methodology, and continuous improvement principles. Supply chain strategy topics include lean vs. agile systems (pages 19–20), vendor managed inventory, vertical integration, outsourcing vs. insourcing, logistics and reverse logistics, and strategic alliances (pages 18–21). Capacity planning strategies (lead, lag, match, adjustment), bottlenecks and Theory of Constraints (pages 21–25), facility location strategies, process layouts, economies of scale and scope, and forecasting methods (qualitative and quantitative) are clearly explained (pages 25–31). Advanced production planning topics include aggregate planning, master production schedule (MPS), material requirements planning (MRP), MRP II, ERP systems (pages 31–33), and Just-in-Time (JIT) systems including pull vs. push systems and Kanban control methods (pages 33–36). The guide concludes with final assembly scheduling, level scheduling, and cycle time calculations (page 37). The structured Q&A format supports conceptual mastery, quantitative application, and Objective Assessment readiness. It aligns closely with WGU’s C720 Operations and Supply Chain Management curriculum and standard operations management textbooks used in MBA and business programs. This document is especially relevant for: • WGU students enrolled in C720 Operations and Supply Chain Management • MBA and Business Administration students studying operations management • Supply chain and logistics management students • Students preparing for Objective Assessment (OA) exams • Professionals reviewing Lean, Six Sigma, and production planning concepts Keywords: WGU C720 operations management exam supply chain management Six Sigma DMAIC MRP and MRP II ERP systems EOQ model EPQ model ABC inventory analysis Pareto principle capacity planning strategies Theory of Constraints lean manufacturing agile supply chain vendor managed inventory kanban system Just in Time master production schedule forecasting methods quality management tools

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WGU C720 Complete OA Prep
Guide 2026 Expert Verified | Ace
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Inputs - 🧠 ANSWER ✔✔People, capital, material, money


Outputs - 🧠 ANSWER ✔✔Services and goods


Sustainability - 🧠 ANSWER ✔✔Defined broadly in operations and supply

chain management as the ethical issues an organization faces to balance

financial performance while maintaining social responsibility standards and

a responsible environmental profile.

,VIRAL - 🧠 ANSWER ✔✔Acronym - A framework for competitive advantage.




Viral, Inimitable, Rare, Aptitude, Lifespan.




The advantage must provide Value to consumers; it should be Inimitable

(not easily imitated), Rare, and an organization must have the Aptitude

(capability) and Lifespan (sustainability) to earn appropriate returns on the

advantage.


Productivity - 🧠 ANSWER ✔✔A mathematical calculation; it is the ratio of

the outputs achieved divided by the inputs consumed to achieve those

outputs.


6 Types of Inventory - 🧠 ANSWER ✔✔o Raw Materials


o Work In Progress

o Finished Goods

o Replacement Parts Inventory

o Supplies

o Transportation

,Raw Materials - 🧠 ANSWER ✔✔These parts and materials are obtained

from suppliers and are used in the production process.


Work-in-process (WIP) - 🧠 ANSWER ✔✔These are partly finished parts,

components, sub-assemblies, or modules.


Finished Goods - 🧠 ANSWER ✔✔Items are ready to ship to the customer.

No more work is required.


Replacement parts inventory - 🧠 ANSWER ✔✔These are maintained to

replace other parts in machinery or equipment as those parts wear out


Supplies - 🧠 ANSWER ✔✔Parts or materials are used to support the

production process but not usually a component of the product. These

items, such as lubricant and cutting tools, are consumed in the production

process.


Transportation (pipeline): - 🧠 ANSWER ✔✔The portion of inventory that is

in the process of being shipped through the distribution system.


4 Types of Demand - 🧠 ANSWER ✔✔o Peak


o Seasonal

o Unexpected


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Peak Demand - 🧠 ANSWER ✔✔Demand which occurs in response to

planned events such as advertising, publicity or promotion. The release of

a popular game franchise's latest version often causes peak demand for a

few days or weeks.


Seasonal Demand - 🧠 ANSWER ✔✔Demand as shoppers adjust their

purchase velocity in line with holidays, especially Christmas. But

Halloween, Thanksgiving and even St. Patrick's Day also create seasonal

demand for certain kinds of merchandise.


Unexpected Demand - 🧠 ANSWER ✔✔Demand which occurs due to a

usually-unexpected event. For example, an underdog school may upset a

favorite during the NCAA's basketball tournament, causing a run on their

merchandise.


Chase Demand - 🧠 ANSWER ✔✔Demand that occurs when a company

has to adjust production by rates to match demand by varying the

workforce and using overtime. Companies vary the workforce by adding or

reducing the number of employees on duty at any given time. And they

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