LGT5015 Chap.1 Supply Chain Scope and Global Optimisation
Supply Chain Scope and Global Optimisation
Why the boundary changes the answer
Supply-chain management treats suppliers, operations, distribution and customers as one connected decision system. Material, information and cash move in different directions, so a local saving can reappear as inventory, delay, lost service or risk elsewhere.
This chapter builds the network boundary used in every later case and shows how conflicting functional objectives make global optimisation difficult.
Three flows, three directions
Products usually move toward customers, demand information travels back toward production and supply, and cash settles obligations across the network.
The directions matter because the actor holding information is not always the actor carrying inventory or collecting revenue. A purchasing decision may be made upstream, experienced as a stock problem in a warehouse and finally noticed as a service failure by a customer.
Mapping the three flows keeps those links visible.
Why sensible departments can create a poor chain
Production prefers stable runs and high utilisation. Transport prefers consolidated loads. Warehousing prefers low inventory. Sales prefers immediate availability and wide choice. Finance prefers less working capital. Each objective has an operational reason, yet maximising all of them independently is impossible.
Global optimisation asks which combined arrangement best supports the chosen customer promise after every material cost, delay, stock consequence and risk transfer is counted.
A reusable case method
First state the network objective in observable language, such as reliable next-day delivery or the lowest total delivered cost.
Next identify the actor changing a decision and trace the consequences for other members. Record whether time, inventory, service, cash and risk rise or fall. If dollar values are available, place them on the same period before calculating a net effect.
If values are missing, name the measurement that would resolve the uncertainty rather than inventing one.
How to make a recommendation credible
A recommendation should identify both its benefit and the burden it moves. Full truckloads may save freight but increase cycle stock. A central forecast may improve coordination but reduce local discretion. A faster promise may require more capacity or inventory.
State the accepted trade-off and the threshold that would cause a review. That closing move shows the decision is systemwide, conditional and capable of being managed after implementation.
What this chapter covers
- 01
Material, information and financial flows
- 02
Local versus global optimisation
- 03
Conflicting functional objectives
- 04
Customer-service boundary
- 05
Directional consequence ledger
- 06
Coordination across firms
Worked example · free
Recompute a local freight saving
- 1Record the local benefit.
- 2Add downstream costs.
- 3Compute and interpret the net effect.
Key terms
- Supply Chain
- A network of organisations and activities linked by product, information and financial flows.
- Global Optimisation
- A systemwide choice that improves total network performance.
- Local Optimisation
- An improvement in one function that may worsen the wider network.
- Customer Promise
- The observable service outcome that gives operating trade-offs their standard.
Supply Chain Scope and Global Optimisation FAQ
Why can a departmental saving be misleading?
A department usually records only the consequences inside its boundary. Larger batches may lower production cost while increasing stock, expiry and delay elsewhere. Rebuild the comparison at network level before deciding whether total performance improved. Use one customer promise and a common time basis, then identify where the local action moves cost, cash, risk or response burden across the chain.
What makes optimisation global?
The analysis includes consequences across relevant members and functions, uses one network objective and acknowledges where cost or risk moves. It does not require every participant to improve equally, but it makes the burden visible. The accepted burden should be assigned, measured and reviewed explicitly.
How should I close a supply-chain case answer?
State what improves, what worsens and why the chosen balance still supports the customer or network objective. Add the evidence or threshold that would make you review the decision. Name the actor responsible for monitoring that evidence and the part of the chain where the accepted burden will appear.
Exam move
Take one operating change and trace its effect on inventory, time, service, cash and risk at every member. Then rewrite the verdict from the whole-network viewpoint. Use a page divided into supplier, focal firm, distributor and customer. Mark the actor who makes the decision and use arrows to show where each consequence lands.
Next, write the customer promise at the top and test whether the local metric supports or conflicts with it. If values are available, convert them to the same annual basis and compute a net effect. If they are missing, write the measurement that would settle the issue and keep the conclusion conditional. Finish with two sentences: the accepted trade-off and the trigger for review.
Repeat with batch size, transport consolidation, service capacity and inventory centralisation until you can identify a hidden cost without being prompted. For case discussion, upgrade a basic statement by attaching one course concept and one operational consequence, then add a defensible alternative that changes the network rather than merely renaming the problem.
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