How fast can case oem process run?

Answer: 68 days standard, 57 with all three parallel moves, and anything faster means breaking a serial link, which gambles with the tool.

When must drawings freeze?

Answer: Day 5. The four frozen items are outer dimensions, wall thickness, draft angle and parting line; later changes need a note and re-sequence the 25 days.

Answer: Back to rework, using T2's 7 days, so the project becomes 75 days. Beyond five changes, re-running T1 is cheaper than patching.

Is a 200-unit batch enough validation?

Answer: Yes. Eight continuous days, checking whether unit 1 to unit 200 drifts more than 0.2 mm, while logging cycle time and scrap rate.

Can the structure change before production?

Answer: No. Once the sample approval is signed the tool is frozen, leaving only colour, insert, printing and packaging changes.

Case Oem Process: Seven Steps from Drawing to Mass Production

Quick answer: Case oem process totals 68 days: drawings 5, tooling 25, T1 3, T2 7, a 200-unit batch 8, production 20. Only 28 days sit on a machine.

Seven Nodes, 68 Days: How the Calendar Breaks
Drawing Confirmation: 5 Days, Frozen on Day 5
Tooling at 25 Days and T1 at 3 Days
T2: 7 Days and the Last Change Window
A 200-Unit Batch and 20 Days of Production
Parallel and Serial: Where 10 Days Come From
FAQ

1. Seven Nodes, 68 Days: How the Calendar Breaks

The 68 days are six blocks and seven handovers. Drawings run D1–D5 for 5 days, tooling D6–D30 for 25, T1 trials D31–D33 for 3, T2 rework D34–D40 for 7, a 200-unit batch D41–D48 for 8, and production D49–D68 for 20.

Split by nature and the picture changes: the tool goes from steel block to a mould that can yield a good part in 28 days, tooling 25 plus T1 3. Of the other 40, twenty are production and twenty sit in drawings, rework, batch and scheduling.

Only 12 of those days are real waiting: review, sign-off, batch report, and that is the part front-loading compresses.

Stage	Window	Days	Cumulative
Drawing confirmation	D1–D5	5	5
Tooling	D6–D30	25	30
T1 trial	D31–D33	3	33
T2 rework	D34–D40	7	40
Batch of 200	D41–D48	8	48
Production	D49–D68	20	68

Each node ends with something signed: a freeze sheet, a tool acceptance sheet, a trial report, a sample approval, a release note. When case oem process slips, nine times out of ten the previous sheet was never signed.

2. Drawing Confirmation: 5 Days, Frozen on Day 5

The 5 days are internal review 2, customer sign-off 2, flow analysis 1. The freeze sheet must exist by the afternoon of day 5, because steel is cut on day 6 and a day lost here shifts everything.

Four items freeze: outer dimensions, wall thickness, draft angle, parting line. Change any of them after day 5 and the 25 days of tooling are re-sequenced, turning 68 days into 70 or more.

Case oem process delivery stage: a black wheeled case upright on a truck tail lift, handle extended, corner bumpers visible, cartons and pallets beside it

Two signatures, two lines. The customer signs appearance and assembly, the factory signs manufacturability. Contracts with one line always produce an argument at T1, where the look passes and the tool cannot run, or the reverse.

The usual delay is physical comparison: an old sample posted back and forth for colour and touch costs 2–3 days. Confirm on day 1 with photos and a colour code and those 3 days leave the critical path.

Freezing does not forbid changes, it forces a change note stating which dimensions move and whether the tool opens. Most case oem process rework traces to a cavity size added after the freeze.

3. Tooling at 25 Days and T1 at 3 Days

The 25 days split into 12 for the mould base, 8 for cavity finishing and 5 for assembly and fitting. They run in series: no base, no cavity work. Steel arriving 3 days late moves the whole chain 3 days with nothing to compress.

T1's 3 days run by the hour: 4 h to mount, 30 consecutive shots, a day of measurement, half a day of reporting. The spread between shot 1 and shot 30 must stay under 0.2 mm; wider means uneven cooling.

Three deliverables close T1: a dimensional report on the first part, the 30 cosmetic parts, the process parameter sheet. Saying it ran is not a deliverable.

A failed T1 goes straight back to rework and consumes T2's 7 days, so the 68-day figure is optimistic: about 60% of projects pass at the first trial and the other 40% add 7 days.

4. T2: 7 Days and the Last Change Window

Seven days means strip 1, rework 3, polish 1, re-measure 1, trial 1. Three changes fit in 7 days, four to five need 10, and beyond five the sensible move is to re-run T1: stacked changes leave stress nothing can predict.

T2 closes with a sample approval, after which the tool is frozen. This is the last window where structure changes cost nothing; afterwards only colour, insert, printing and packaging are open.

Case oem process sample review: three black cases, one with foam slots and a clear bottle, one blue tray with slots, one with circuit board

Split the signatures: the customer signs appearance and fit, the factory signs dimensions and process window; dropping the factory line turns sink marks at production into a blame exchange.

Re-measure everything at T2, not five key dimensions: the costliest case oem process rework starts with the sixth failing in production.

5. A 200-Unit Batch and 20 Days of Production

200 units in 8 days is 25 a day, including colour change cleaning and first-article approval. The batch runs the tool 8 straight days and watches the drift between unit 1 and unit 200 against the 0.2 mm limit.

Record three sets: cycle time, scrap rate, first-to-last dimensional spread. Pass all three and production has a basis; scale straight from 30 T1 shots and the risk lands on the back end.

Production's 20 days are scheduling 3, moulding 12, finishing 5. At an estimated 2 min per shot, work out what 12 days actually yields before a delivery date goes into a contract. Finishing covers trimming, inserts, hardware and labels, and is the step most often left out of the plan.

6. Parallel and Serial: Where 10 Days Come From

Three moves can overlap: rough machining the mould base starts before the freeze once outer dimensions are fixed, saving 4 days; batch scheduling overlaps T2 re-measurement for 2; printing overlaps production for 5. Together they save 11 days, turning 68 into 57.

Four links must stay serial: freeze to tooling, T1 to rework, T2 to batch, batch to production. Pull any of them forward and the result is not speed but scrap.

Move	Relation	Days saved	Condition
Early mould base machining	Parallel with drawings	4	Outer dimensions locked
Early batch scheduling	Parallel with T2 re-measure	2	Sample dimensions passed
Carton printing	Parallel with production	5	Artwork and barcode fixed
Freeze to tooling	Serial	0	None
T2 to batch	Serial	0	Sample approval signed

Conclusion

Memorise the 68 days as 5, 25, 3, 7, 8 and 20. What matters more are the four serial gates between them: drawing freeze, T1 report, sample approval, release note. With all four signed the calendar holds; missing one and every later block restarts.

Draw the four serial links first, then stack the mould base, batch scheduling and packaging on top: that is where 57 days comes from, not from pushing the factory. Speed extracted by pressure is repaid as scrap rate.

Finally, put the case oem process calendar in a schedule both sides sign, listing a deliverable and signatory per node, not a single delivery date: projects that publish one date cannot explain which block ran late. The table below works as that annex.

Node	Days	Deliverable	Signatories	Bottleneck
Drawing confirmation	5	Freeze sheet	Customer, factory	Physical comparison, 2–3 days
Tooling	25	Tool acceptance sheet	Factory	Steel 3 days late
T1 trial	3	Trial report, first-part data	Factory	30-shot drift over 0.2 mm
T2 rework	7	Sample approval	Customer, factory	More than five changes
Batch of 200	8	Batch report	Factory	First-to-last spread over 0.2 mm
Production	20	Release note, outgoing check	Customer, factory	Finishing left unscheduled

This article discusses container-side specifications and design implications only, and does not cover any handling, loading or use of the contents.