Time-and-Action (T&A) Calendar
A time-and-action calendar back-schedules every production and buying milestone from the delivery date, so a late sample or approval is visible weeks before it becomes a late season.
A time-and-action calendar (T&A calendar, also written TNA) is a milestone schedule that works backwards from a delivery date through every step that has to happen first — fabric booking, lab dips, sample approvals, production start, ex-factory, transit — with an owner and a deadline for each. It is the apparel supply chain's critical path, written down.
Why it is built backwards
The delivery date is fixed by the floor set or the launch, so the calendar is back-scheduled: if goods must land in the DC in week 30, and transit is 4 weeks, production 6 weeks, and approvals 3 weeks, then approvals must close by week 17 — and everything upstream inherits its deadline the same way. Building it forward from "when can the vendor start" produces a calendar that describes what will happen; building it backward from delivery produces one that describes what must happen, which is the version that can raise an alarm.
What a working T&A tracks
For each style or PO, the calendar carries a row per milestone with the planned date, the actual date, and the responsible party — brand, vendor, or mill. The typical milestone chain for a cut-and-sew program runs:
- Materials committed — fabric and trim booked against the buy quantity.
- Approvals closed — lab dips, fit samples, PP samples signed off.
- Production window — start and end, sized to the vendor's real capacity.
- Ex-factory and transit — the handoff where delay stops being recoverable.
- DC receipt and floor set — the dates the merchandise plan actually depends on.
The value is in the slippage math: a fit comment returned five days late consumes five days of a buffer somewhere downstream, and the calendar shows which buffer and how much of it is left.
T&A and the merchandise plan
The T&A calendar is where the receipt plan meets reality. OTB and the sales plan assume receipts land in the week they were planned; the T&A is the early-warning system for the weeks when they will not. Planning teams that review T&A slippage weekly can re-phase receipts, chase alternatives, or move a launch while options still exist — teams that discover slippage at the ASN find out when the only remaining option is a markdown.
A single-program T&A fits comfortably in a spreadsheet — our sister site retail-plan.com publishes a free T&A calendar template with the back-scheduling structure built in. The spreadsheet version stops scaling when dozens of POs each carry their own calendar and nobody can see aggregate slippage by vendor or by delivery week.
RetailNorthstar connects production milestones to the receipt plan they protect, so a slipping approval shows up as a receipt-week risk in the same system that holds the OTB. See how RetailNorthstar handles production visibility →