Operations

Promise buffer

The padding added to a quoted delivery time so the commitment survives a bad day. Every operation has one, most do not know its size, and it is paid for twice: once in customers who choose a faster competitor, and once in capacity held against a risk that rarely lands. Delivering early half the time is the sign the buffer is too wide.

Where this fits

The day-to-day vocabulary of running deliveries. Routes, waves, drops, manifests, ETAs, SLAs. These are the units operators reason in, and the inputs every downstream model needs.

Related terms

Cost per delivery: The unit metric: total delivery spend divided by orders delivered. Where delivery costs name the components, cost per delivery is the single number an operator watches, and the one Nash drives down when you set margin as the objective.
Route adherence: How closely the executed route matched the planned one: sequence kept, stops served in window, no improvised detours. Low adherence usually means the plan was wrong rather than the driver was, because drivers route around what the model could not see. Measuring it is how an operation finds the constraints missing from its own planning.
Branded tracking: The live order-tracking page a recipient sees, carrying the merchant's brand and voice rather than the carrier's. Keeps the last, most anxious stretch of the purchase inside one experience the merchant controls.
Hours of service: The regulated limit on how long a commercial driver may drive and work before a required break or reset. A hard routing constraint: a plan that ignores it produces routes a driver cannot legally finish, and the break has to be placed where there is somewhere to stop.
WISMO: Short for where is my order, the support contact a customer makes when they cannot see their delivery. High WISMO volume is a symptom of poor visibility and loose promises; accurate tracking and tight ETAs are how Nash drives it down.