A cheaper department can create a more expensive business
Northline is a hypothetical maker of replacement parts for small factories. Its promise is dependable next-day delivery. Procurement proposes ordering larger batches less frequently to reduce the price per part. The saving looks attractive until the warehouse team asks what happens when one urgent part is unavailable.
Value chain analysis examines the activities through which a business creates and delivers value. Harvard Business School’s Institute for Strategy and Competitiveness describes activities and their connections as the basis of competitive advantage. Northline’s case, costs, and decisions here are invented.
The practical question is whether the proposed purchasing change strengthens the whole offer. A departmental saving is useful only after the business understands its consequences elsewhere.
Map work rather than the organization chart
Northline writes down how an order becomes a delivered replacement. Someone forecasts demand, buys stock, receives it, checks quality, picks the order, arranges transport, and helps the customer if the part does not fit. Finance and technology support several of those activities.
A department can perform several activities. One activity can span several departments. Mapping only reporting lines would hide the handoffs that make the next-day promise possible.
Activities and their links shape cost and differentiation
Primary activity
Inbound logistics
Receive and manage the inputs needed for delivery.
Primary activity
Operations
Transform inputs into the product or service.
Primary activity
Outbound logistics
Get the completed offer to the customer.
Primary activity
Marketing and sales
Help customers understand and buy the offer.
Primary activity
Service
Support customers after purchase.
Across the chain
Supporting activities
Infrastructure, people, technology, and procurement support the primary activities.
The primary categories provide a vocabulary, not an instruction to give every category equal attention. A service business should translate them into its actual work. Northline begins with stock availability, picking accuracy, carrier cutoff times, and returns because those activities directly affect its stated promise.
Trace a purchasing decision through the chain
Suppose larger batches reduce purchasing cost by an invented 600 currency units per month. The proposed schedule also creates an estimated 250 units of extra storage cost and 500 units of emergency transport. Under those assumptions, the net monthly effect is 600 − 250 − 500 = −150.
That calculation excludes customer losses and financing costs, so it is not a complete investment appraisal. Its purpose is to show why Northline should not approve the proposal from the purchasing line alone. The emergency-transport estimate is especially important: if it is wrong, the conclusion could change.
The team asks purchasing and dispatch to inspect recent shortages together. They should separate stockouts caused by the order schedule from those caused by inaccurate demand data, supplier failures, or damaged stock. Otherwise, the business could blame the wrong activity and fix nothing.
Look for differentiation as well as cost
A good value chain review does more than find expenses to cut. Northline might support its next-day promise through accurate stock information, a focused parts range, and a carrier agreement aligned with customer working hours.
These choices need to fit together. Offering every possible part could undermine availability. Extending sales hours without extending warehouse coverage could create promises that dispatch cannot keep. More features in one activity can weaken the overall proposition.
For each important activity, ask what customer outcome it supports, what it costs, which other activities depend on it, and how it differs from alternatives. Customer willingness to pay still needs evidence; an expensive activity is not valuable simply because staff work hard at it.
Choose a change small enough to inspect
Northline’s proposed next step is to test the revised buying schedule on predictable, nonurgent parts while retaining the current policy for critical stock. The review should track purchase cost, stock availability, storage, emergency shipments, and delivery performance over the same period.
Record any difference in product mix or demand. A quieter month can make an unsuitable policy look successful. The pilot is a way to learn about the connections, not a claim that the change will work.
For your own analysis, define the customer promise first. Map the activities needed to deliver it, add supporting work, and trace one proposed change across the map. Assign someone to reconcile costs that cross departmental budgets.
Know the boundary of the analysis
Internal activity mapping cannot establish industry attractiveness. Use Porter’s Five Forces when suppliers, substitutes, buyers, and rivals shape the wider economics. Use the Business Model Canvas when you need a broader picture of customers, partners, revenues, and resources.
Avoid drawing a complete-looking chain and treating it as a measured model. Northline needs operational records to challenge its transport estimate and customer evidence to assess the delivery promise. The next useful output is a supported decision about the buying schedule.
Sources and further reading
- Harvard Business School, Institute for Strategy and Competitiveness, The Value Chain. The activity perspective follows this account of Michael Porter’s framework; the cost calculation is hypothetical.