A value chain is the ordered set of activities your company performs to turn inputs into a product a customer pays for. Each step adds cost and, ideally, more value than it costs. Mapping the chain shows where your margin is created, where it leaks, and which steps you should own.
A useful map has two rows. The primary activities move the product forward: sourcing, production, logistics, marketing and sales, service. The support activities make them possible: finance, hiring, IT, purchasing. Attach a cost to each step and ask one blunt question at every one. Would a customer pay for this if they saw it on the invoice?
An example from a small coffee roastery, per kilogram. Green beans cost 6.00. Roasting costs 1.20. Packaging costs 0.80. Shipping costs 1.50. Total cost is 9.50 and the bag sells for 18.00, so 8.50 stays in the company, a gross margin of about 47 percent. Now the founder considers outsourcing the roasting for 3.00 per kilogram. Total cost rises to 11.30, and the margin falls to 6.70, or about 37 percent. The number makes the decision concrete: giving up 1.80 per kilogram buys free time and less equipment risk, and you can judge whether that trade works at your volume.
Business plans usually include a value chain description, because a reader wants to see which parts of the process you control and where you depend on others.
The frequent mix-up is with the supply chain. The supply chain is the flow of goods and information between companies. The value chain is the set of activities that add value inside your company, including support work that never touches the product. A second mistake is mapping the chain once and then filing it away. Prices, suppliers, and tools change, so revisit the numbers once a year.
