Course contents
Practitioner · Course 1: Order to Ship: the Critical Path · Lesson 3 of 5

Spotting a slipped milestone before it threatens the ship date

Level: PractitionerTime: 40 minutesOrder used: A (the T-shirt, used as the reference schedule)Tool: Critical path tracker
For a merchandiser at a domestic brand or its supplying factory who must compare a checkpoint's actual finish date against its deadline, early enough for a slip to still be fixed. Lessons 1 and 2 are useful background but not required. Figures are teaching figures.
BrandCedar & Co. (12 shops, domestic)
FactoryDelta Garments
Order shapeMake to Stock (MTS), domestic, restock run of a basic T-shirt style
Business modelMake to Stock (MTS), domestic
Reference scheduleOrder A's own checkpoint structure, used to judge a similar domestic run
ToolCritical path tracker (this course's workbook)
02Opening

This page explains how to compare a checkpoint's actual finish date against its own deadline often enough to catch a slip while it can still be fixed

This page is for a merchandiser at a domestic brand, or at the factory supplying it, who must watch each checkpoint on a live order's schedule and notice, as early as possible, when one is about to finish later than planned. At work, this person checks a tracker regularly, not only when someone asks, and has to tell a genuine slip apart from a stage that simply has not been updated yet. This is chiefly an information-flow skill: keeping a schedule's real status visible early enough that a small slip can still be absorbed, instead of only becoming known once it has already grown into a threat to the final date. Without regularly checking each checkpoint's actual date against its deadline, a small delay at one stage can sit unnoticed until it has already used up the buffer meant to protect the stages after it.

03Before you start

You need: Lessons 1 and 2's checkpoint list and backward-counted deadlines. Useful, not required.

By the end of this lesson you can:

  • compare a checkpoint's actual finish date against its planned deadline on a live tracker;
  • tell a recoverable delay apart from a non-recoverable one, using the buffer remaining;
  • decide when a slipped checkpoint needs to be escalated rather than simply noted;
  • apply the same comparison method to a domestic Make to Stock schedule, not only an export order.

Not covered here: naming a schedule's checkpoints (Lesson 1), setting each checkpoint's own deadline (Lesson 2), and rebuilding the plan once a checkpoint has already slipped (Lesson 4).

04Key terms

Words you will meet in this lesson

TermMeaning
CheckpointA specific moment in an order's life where its progress is checked against the plan.
On trackA stage finishes on or before its planned date.
Recoverable delayA stage finishes late, but a buffer later in the timeline absorbs it without moving the final date.
Non-recoverable delayA stage finishes late with no buffer left, so the final date must move or a costlier recovery option must be used.
Production trackingComparing a stage's actual finish date against its planned date throughout production, to catch a delay while it can still be fixed.
EscalateTelling the people who need to know, early, that a delay may change the delivery date, instead of waiting for it to happen.
05Teaching
The rule

A checkpoint has slipped only once its actual finish date is later than its planned deadline, and whether that slip still matters depends on how much buffer is left ahead of it

A checkpoint is on track while its actual finish date is on or before its own planned deadline; it has slipped once its actual date passes that deadline. A slipped checkpoint is not automatically a crisis: if enough buffer still sits between it and the ship date, the delay is a recoverable delay, absorbed without moving the final date. If no buffer is left, the same slip becomes a non-recoverable delay, and either the ship date must move or a costlier recovery option, such as overtime or air freight, must be used. Spotting a slip early is what keeps the choice between these two outcomes open; a slip discovered late has already used up the time that could have kept it recoverable.

Recoverable delayNon-recoverable delay2 days late5 buffer days remain5 days late2 buffer days remainShip date holdsShip date must move, ora costlier option is used
The same size of slip is recoverable or non-recoverable only depending on how much buffer is actually left ahead of it.* A checkpoint's own days-late figure means nothing on its own, without also checking the buffer remaining before the ship date.
What you meet in real life

The same comparison method applies to every order, but how often a tracker is checked, and who owns catching a slip, differs by market and business model

What can differThe shapes you meetWhy it matters
Export order vs. domestic Make to Stock orderAn export order like Order A is checked against one buyer's own contracted ship date; a domestic Make to Stock brand like Cedar & Co. checks its own restock run against a shop-floor date it set for itself, with no buyer contract behind it.A domestic brand missing its own internal date faces empty shop shelves rather than a buyer's claim, but the cost of a slip is still real, just paid in lost sales rather than a contract penalty.
A confirmed order vs. a standing-stock runOrder A's checkpoints are checked once, from confirmation to its one shipment; Cedar & Co.'s standing style repeats its own checkpoints on every new production run, each run needing its own fresh check.Assuming a standing style's schedule is "always fine" because a past run finished on time skips the check a new run's own fabric lot still needs.
How often the tracker is checkedA high-risk stage, such as fabric booked with an outside mill, may be checked every few days; a low-risk stage already finished may only need a final confirmation entry.Checking every stage on the same fixed schedule wastes attention on stages already closed, while a genuinely at-risk stage goes unchecked in between visits.
Who owns catching a slipAt Delta Garments, Karim, the production manager, owns catching a slip on the factory floor; at Cedar & Co., Omar, the owner, or his own merchandiser owns catching a slip on the brand's own restock schedule.A slip nobody is clearly assigned to notice can sit unrecorded until it has already used the buffer meant to protect it.
Socks, terry, and home-textile product familiesA hosiery, terry, or bedding order's tracker compares the same actual-versus-deadline dates, using that product's own checkpoint names, such as linking for a sock order instead of sewing.The comparison method does not change by product family; only which named checkpoint is being compared changes.
The case we follow

Cedar & Co.'s merchandiser checks a domestic restock run's fabric-in-house checkpoint against Order A's own reference schedule shape and finds it two days late

Cedar & Co., the domestic brand with 12 shops, runs a Make to Stock restock of a basic T-shirt style through Delta Garments, on a schedule shaped the same way as Order A's own checkpoint structure but built around Cedar & Co.'s own shop-floor date rather than an export buyer's ship date. Cedar & Co.'s merchandiser checks the tracker on the planned deadline day for fabric in-house and finds the actual date is two days later than planned. Karim, the production manager at Delta Garments, confirms the run still has five buffer days remaining ahead of cutting and sewing, days already built into the schedule for exactly this kind of small mill delay.

The worked number

A two-day slip against five remaining buffer days stays a recoverable delay, with three buffer days still left afterward

Planned fabric-in-house deadline: day 40 (of the domestic run's own schedule)
Actual fabric-in-house date: day 42
Slip: 42 - 40 = 2 days late
Buffer remaining ahead of cutting and sewing before this slip: 5 days
Buffer remaining after absorbing the slip: 5 - 2 = 3 days

Three buffer days still remain after this slip is absorbed, so the restock run's own shop-floor date does not move; the delay is a recoverable delay. Had the actual date instead landed at day 46, four days late against the same five-day buffer, only one buffer day would remain, cutting it close enough that Cedar & Co.'s merchandiser would already be preparing to escalate rather than simply noting it.

The method

A four-step method for checking a checkpoint and deciding whether a slip is recoverable

1. Compareactual date toplanned deadline2. Calculatethe size ofany slip3. Check bufferremaining aheadof next stage4. Decide:recoverable, orescalate now
Checking any single checkpoint is a fixed four-step comparison, whatever the order.* Skipping step 3 is how a small slip gets escalated unnecessarily, or a large one gets left unescalated until it is too late.
  1. Compare the actual finish date against the planned deadline for each checkpoint currently open on the tracker.
  2. Calculate the size of any slip, in days, if the actual date is later than planned.
  3. Check how much buffer remains ahead of the next stage on the critical path.
  4. Decide whether the delay is recoverable given that buffer, or whether it should be escalated now, before the buffer runs out.
The trap

A common mistake is checking a tracker only when someone asks, instead of on a regular schedule

A common mistake, on a domestic Make to Stock run with no buyer pressing for updates, is checking the tracker only when someone happens to ask about it, rather than on a regular schedule regardless of who is asking. A slip that would have been a small, easily recoverable two-day delay if caught the day it happened can grow unnoticed into a much larger, non-recoverable one by the time anyone next looks, because nobody was checking in between. Regularly checking a live tracker, on an export order and a domestic run alike, is what keeps a slip small enough to still be recoverable by the time it is actually caught.

06In plain words

A stage on a schedule is on track while it finishes on or before its planned date, and it has slipped once it finishes later. A slip does not automatically threaten the final date: if enough spare time is still built into the schedule ahead of it, the delay is absorbed and nothing changes. If no spare time is left, the same slip forces either the final date to move or a more expensive way of catching up. Checking a live tracker regularly, not only when someone asks, is what lets a small slip be caught while it is still small, on a domestic brand's own restock schedule just as much as on an export buyer's order.

07Quick check
  • A checkpoint is on track while its actual finish date is on or before its planned deadline.
  • A slip's size alone does not decide whether it matters; the buffer remaining ahead of it does.
  • A recoverable delay is absorbed by remaining buffer without moving the final date.
  • A non-recoverable delay leaves no buffer, forcing the final date to move or a costlier option to be used.
  • A domestic Make to Stock brand checks its own restock run against a shop-floor date it set itself, not a buyer's contract.
  • Checking a tracker only when asked, rather than on a regular schedule, lets a small slip grow before it is caught.
  • The same four-step check applies whether the schedule belongs to an export order or a domestic run.
08Workplace scenario

Cedar & Co.'s merchandiser must decide whether a four-day fabric slip on the restock run still leaves enough buffer before cutting begins

Cedar & Co.'s restock run has just reported its fabric-in-house checkpoint four days later than planned, and the merchandiser must decide today whether to escalate to Omar, the owner, or simply log it and move on.

  • The run's schedule originally carried a five-day buffer ahead of cutting and sewing, the same shape of buffer Order A's own reference schedule carries.
  • The actual fabric-in-house delay is four days.
  • Cutting and sewing on this run typically need their own full planned length, with no spare days built into that stage itself.
  • The merchandiser must decide today, since cutting is due to start tomorrow on the current plan.

The tracker's own entry for this checkpoint, exactly as it stands:

Critical path tracker, fabric-in-house row. "Planned deadline: day 40. Actual: day 44. Slip: 4 days. Buffer remaining ahead of cutting: 5 days minus 4 days slip."

Does this four-day slip still leave enough buffer to stay recoverable without escalating? Decide before you open the decision.

Show decision

Yes, but only just. Five buffer days minus a four-day slip leaves one buffer day remaining, technically still recoverable, but the merchandiser should flag it to Omar now rather than wait.

The two facts that decide this are the five-day buffer originally built into the schedule and the four-day actual slip, leaving one day of buffer, not zero. One day is not a non-recoverable delay, but it is thin enough that any further delay at all, even a single day at cutting, would use up the remaining buffer entirely. The merchandiser logs it as recoverable for now and tells Omar today, so a further slip is caught immediately rather than only once the buffer is already gone.

09What it costs

The cost of catching this slip today against the cost of Cedar & Co.'s own shop-floor date moving

Checking the tracker and flagging a thin one-day buffer today costs the merchandiser a short conversation with Omar and nothing more. The cost of missing this same slip, and only noticing it once cutting has already started late, is Cedar & Co.'s own shop-floor date moving, leaving empty shelf space across some of its 12 shops during the restock window. Missing even a single week of shelf availability on a fast-moving basic style, at Cedar & Co.'s own shop price of USD 19.90 per piece, costs far more in lost sales across 12 shops than the few minutes it takes to check a tracker on the day a deadline is due.

10Working template

Critical path tracker: the columns this lesson fills

This lesson adds the actual finish date, the slip in days, the buffer remaining, and the recoverable/non-recoverable status to the tracker built in Lessons 1 and 2. [Download the tracker](templates/T11-C01-critical-path-tracker.xlsx).

MilestonePlanned deadlineActual dateSlipBuffer remainingStatus
Fabric in-house (Cedar & Co. restock)Day 40Day 444 days1 dayRecoverable, flagged
Cutting and sewing completeDay 49Not yet due——Not yet due

Download the Critical path tracker (Excel)

11Check yourself

1. Two checkpoints each finish three days late. One has six buffer days remaining ahead of it; the other has two. What does this mean for the two delays?

2. Why should a live tracker be checked on a regular schedule, rather than only when someone asks for an update?

12Glossary
ENARFRTRMeaning
Checkpointنقطة فحصPoint de contrôleKontrol noktasıA specific moment in an order's life where its progress is checked against the plan.
On trackعلى المسار المخططDans les tempsZamanındaA stage finishes on or before its planned date.
Recoverable delayتأخير قابل للتعويضRetard rattrapableTelafi edilebilir gecikmeA stage finishes late, but a buffer later in the timeline absorbs it without moving the final date.
Non-recoverable delayتأخير غير قابل للتعويضRetard non rattrapableTelafi edilemeyen gecikmeA stage finishes late with no buffer left, so the final date must move or a costlier recovery option must be used.
Production trackingتتبع الإنتاجSuivi de productionÜretim takibiComparing a stage's actual finish date against its planned date throughout production, to catch a delay while it can still be fixed.
Escalateتصعيد الأمرAlerter (faire remonter)Üst makama bildirmek (eskalasyon)Telling the people who need to know, early, that a delay may change the delivery date, instead of waiting for it to happen.
13Next

Lesson 4: Rebuilding a critical path after one milestone has already slipped

Now that you can spot a slipped checkpoint early, the next lesson shows what to do once a checkpoint has actually already missed its deadline: how to rebuild the remaining schedule around the unchanged ship date. Back to the course map

14Ladder

RecognizeTell a checkpoint that is on track apart from one that has slipped.
ConnectMatch a slip's size against the buffer remaining to judge whether it is recoverable.
CompareContrast checking a tracker on a regular schedule against checking it only when asked.
DecideEscalate a thin-buffer slip immediately, even when it is still technically recoverable.