#967 1995 · Cemex (Lorenzo Zambrano) · Building materials / cement and ready-mix concrete
Cemex tracked its concrete trucks by GPS and guaranteed delivery like a pizza chain
the problem
Concrete sets within hours, but Cemex could only promise a three-hour window, so builders over-ordered and crews idled.
background
Ready-mix concrete is a race against a clock nobody controls: from the moment cement, water and aggregate combine, the mix begins hardening, giving crews only a couple of hours to pour it before it's useless. Yet demand for concrete is wildly unpredictable — a rained-out pour gets rescheduled at the last minute, a crew finishes early and needs the next batch now — so ready-mix companies, Cemex included, historically promised delivery only within a broad window, often three hours. Customers responded by over-ordering as insurance and building slack into every schedule, which meant idle trucks, idle crews, and cement that hardened in transit when timing slipped.
The standard industry fix was more trucks and more buffer inventory — brute-force capacity to absorb the unpredictability. Mexican cement producer Cemex, led by CEO Lorenzo Zambrano, instead treated the problem as a routing and information problem: the trucks already existed and were already on the road, the question was whether dispatch could see and react to real-time demand fast enough to make a truck arrive on time without adding fleet.
what everyone would do
The available fix inside the industry was simply more trucks and more buffer stock to absorb unpredictable demand — a capital-intensive answer that raised costs without shrinking the fundamental mismatch between concrete's short usable life and construction's unpredictable schedule.
what they saw
Cemex's trucks sat idle not for lack of trucks but because dispatch couldn't see them relative to a changed order. The bottleneck was information, not capacity, fixable with GPS instead of more mixers.
the move
Starting in 1995, Cemex fitted its ready-mix trucks with GPS and onboard computer terminals feeding a central dispatch system it called 'dynamic synchronization of operations' — modeled explicitly on how emergency dispatchers route ambulances, not how competitors routed concrete. Dispatchers could see every truck's exact position and constantly re-route them as orders changed, and Cemex then did something no concrete company had dared: it guaranteed delivery within 20 minutes of the promised time, with a 5% price discount if it missed, turning a perishable industrial commodity into a service with a pizza-delivery-style promise.
why it works
Guarantees only work when the guarantor has actually eliminated the underlying uncertainty; Cemex earned the right to promise a 20-minute window because GPS-fed dispatch gave it real-time truck positions to route against, closing the gap between 'best effort' and 'reliable.' The penalty clause then did the marketing work no ad campaign could: customers stopped over-ordering and stopped padding schedules once they trusted the delivery promise, which is the entire commercial payoff.
the payoff
Mexico City delivery time fell from about 180 minutes to roughly 20, and truck productivity rose 35% within two years.
where it breaks
The mechanism needs a fleet already in motion that can be re-routed cheaply — it doesn't help if the constraint is total capacity rather than allocation. It also requires the guarantee's penalty to be credible and large enough that customers actually change behavior, and dispatch technology reliable enough that missed windows stay rare, since routine payouts would undo the economics.
what came after
The 'Cemex Way' logistics model, later folded into digital ordering platforms like CEMEX Go, became a widely taught operations-management case on applying real-time routing intelligence to a low-tech, capital-intensive commodity business, and pushed the wider ready-mix industry toward guaranteed rather than best-effort delivery windows.
references
- [1]Cement meets the cyberworldForbes Global, 1998forbes.com
- [2]Ready-Mix Concrete where you want it, when you need it. Confirmed and guaranteedCemex, 2020cemex.com