wunder betaSC How Supply Chains Work
Learn how forecasts, inventory, lead times, and shared information shape supply chains and the bullwhip effect.
What you’ll learn
- A product is a chain of linked decisionsExplain the physical, information, and financial flows that connect suppliers, producers, logistics providers, retailers, and customers.A supply chain is a network of linked decisions and flows, not merely a shipping route.
- Forecasts turn uncertain demand into plansDescribe how demand evidence, forecasting, capacity, and assumptions become an operating plan.Forecasts organize uncertainty, but they must be measured, revised, and checked against supply constraints.
- Inventory is a buffer with a priceDistinguish cycle stock, safety stock, reorder points, inventory position, and inventory accuracy.Inventory bridges timing gaps while imposing costs, so its quantity and records need deliberate control.
- The bullwhip amplifies small signalsExplain how delays, batching, promotions, and local reactions amplify demand variation upstream.Shared information and stable replenishment rules can reduce amplification without pretending uncertainty has vanished.
- Designing a resilient chainConnect mapping, redundancy, capacity, scenarios, and recovery measures to supply-chain resilience.Resilience comes from visibility and options that are chosen against the consequences of failure.
Questions this course answers
Which flow usually moves in both directions across a supply chain?
Information travels downstream and upstream so participants can coordinate demand, inventory, capacity, and delivery.
Put the planning sequence in a sensible order.
A forecast should be grounded in evidence, tested against supply constraints, and then translated into a plan.
Match each inventory idea to its role.
These concepts describe different reasons stock exists or different signals used to control it.
Complete the sentence about upstream variation.
Small changes in end demand can become larger changes in upstream orders because of delays, batching, forecasting, and local reactions.
In one sentence, explain why a second supplier can improve resilience even when it costs more.
Redundancy buys an option to continue or recover when a single source is disrupted.
Why can a single supply-chain metric be misleading?
System performance has tradeoffs, so one improved number may hide a worsening result in another part of the chain.
Grounded in trusted sources
- MIT OpenCourseWare, Analysis of Inventory Models with Limited Demand Information: https://ocw.mit.edu/courses/esd-273j-logistics-and-supply-chain-management-fall-2009/resources/mitesd_273jf09_lec07/
- The Open University, Can you manage a supply chain?: https://www.open.edu/openlearn/money-business/business-strategy-studies/can-you-manage-supply-chain
- OpenStax, Introduction to Business 10.4 Pulling It Together: Resource Planning: https://openstax.org/books/introduction-business/pages/10-4-pulling-it-together-resource-planning
- NIST Manufacturing Extension Partnership, Supply Chain Management: https://www.nist.gov/mep/supply-chain
- NIST, How Small Manufacturers Can Develop Risk Management Strategies for Their Supply Chains: https://www.nist.gov/feature-stories/how-small-manufacturers-can-develop-risk-management-strategies-their-supply-chains
Every Wunder lesson is built from real, reputable sources — never invented.
Related Math courses
Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.
Browse more Math courses · All topics · Home
© 2026 Wunder Learning LLC · Terms & Privacy