E-commerce economics and metrics
The core set includes gross profit, contribution margin per order, CAC, repeat-purchase rate, LTV, conversion, average order value, availability, cancellation rate, fulfillment time and cost, returns, and service contacts. Review metrics by category, segment, cohort, and fulfillment journey. An average often conceals unprofitable growth in specific combinations of product, customer, and delivery method.
Separate leading indicators from outcome metrics. Availability, response speed, and successful picking show whether the process can deliver on its promise; repeat purchases, gross profit, and contribution margin confirm that the change created value. No single metric replaces the causal chain: higher conversion may result from a discount and worsen the financial outcome.
Common mistakes and constraints
A new interface cannot cure a weak offer, advertising cannot replace accurate inventory, and a separate KPI for the online team cannot create omnichannel. Premature automation and endless data preparation are both dangerous. A solution should be accurate enough for the next action, and scaling should follow proven impact. The shared channel model is covered in omnichannel transformation.