The sitewide discount code is a blunt instrument that answers a hard question with a guess. The hard question: what is the minimum offer that moves this specific product to this specific customer without giving away margin that didn't need to be spent? Answering it requires data the marketing calendar never sees: product cost, current margin, days in stock, and the customer's value to the business.
The Four Inputs
Margin defines the ceiling: a 65 percent margin product can absorb a 30 percent discount and still profit, a 25 percent margin product cannot absorb 10. Stock age defines the pressure: every additional month of holding adds carrying cost, so the acceptable discount rises with the calendar. Velocity defines the alternative: a product that might still sell through at full price deserves patience, a frozen one does not. And customer lifetime value defines the audience side: a first time browser and an $800 CLV repeat buyer should not see the same offer for the same product.
The Four Outcomes
Run those inputs through the rules and most situations resolve into four plays. High margin plus heavy overstock plus a VIP gets the aggressive clearance code, 25 to 30 percent, single use, 48 hour expiry. High margin plus moderate overstock plus a new customer gets a 15 percent acquisition offer, conversion is the goal, not liquidation. Low margin product gets free shipping regardless of stock, because the price has no room. And a trending product going to a VIP gets no discount at all, early access is the offer, exclusivity instead of margin. That last one matters: a system that knows when not to discount pays for itself.
The full matrix with live examples is on our inventory driven marketing engine page under the intelligence layer section.