Starting from zero and reaching a trial-molded part takes 10 to 20 weeks for a typical consumer electronics product, roughly two and a half to five months. It breaks into four stages: appearance design 2 to 4 weeks, structural design 3 to 6 weeks, prototype validation 1 to 2 weeks, and tooling plus trial production 4 to 8 weeks. Products with a lithium battery, wireless charging, a motor, or 3C, CE or FCC certification tend to sit at the 20-week end.
Why designers should care: the schedule is not negotiated at the end, it is decided by when the requirements are frozen. Most overruns trace back to one meeting that did not happen.
Cost context: appearance design alone runs 5,000 to 12,000 RMB, appearance plus structure 15,000 to 40,000 RMB, and a full package covering appearance, structure, CMF and tooling follow-up 30,000 to 80,000 RMB.
Stage 1: How the Timeline Splits, and What Each Part Costs in Days
The core answer: the four stages add up to the total. Appearance design takes 2 to 4 weeks. Concept sketches settle the direction in 3 to 5 days, and the rest goes into 3D modelling and CMF options; a client feedback round is commonly 3 to 5 days, so the pace of client feedback matters as much as the design work.
Structural design, 3 to 6 weeks, is the largest block. A complete structure means assembly drawings, part drawings, draft angles, snap fits and screw bosses, plus confirming standard-part lead times with suppliers. For products with 30 to 60 parts, four to five weeks is the normal rhythm.
Prototype validation takes 1 to 2 weeks. A CNC set with painting, silk screening and assembly is typically about a week. SLA or silicone moulding is faster, but the surface is far from a production part, so it validates structure rather than feel or appearance.
Tooling and trial production takes 4 to 8 weeks. From receiving the 3D to the T1 trial shot is usually 3 to 5 weeks, and one revision after the trial adds another 1 to 2 weeks. That is normal for mould shops in Dongguan and Shenzhen; rush orders can be squeezed in, depending on machine availability.
Stage 2: Where the Timeline Actually Gets Stuck
The core answer: two places. Structural review rounds and mould revisions after the trial shot. A structural revision costs 3 to 7 days, a mould revision costs 1 to 3 weeks, and together they typically add 3 to 6 weeks beyond the plan.
Structural delays usually are not the designer's fault, they come from information that was never locked down. On a blood pressure monitor we built, the battery compartment was revised three times, and two of those were because the client had not yet decided between two AAA cells and a lithium battery: compartment dimensions, button positions and the display flex all moved with that decision. Confirming that class of information at the first review saves about two weeks.
Mould delays come from trial parts that do not match design intent. Sink marks, warpage and weld lines are invisible in 3D and only appear at T1. The mould shop also has to slot the revision into its machine schedule, and two to three weeks in peak season is normal.
Certification is the bottleneck people forget. 3C, CE and FCC take 3 to 6 weeks and should run in parallel with tooling. Waiting until the mould is finished before submitting pushes the whole schedule back by a month.
Stage 3: What Can Be Compressed and What Cannot
The core answer: appearance and structure can be compressed. Appearance from four weeks to two is realistic, and structure from six weeks to three or four is feasible, provided the requirements are stated once and the review does not exceed two rounds. Tooling at 4 to 8 weeks cannot be compressed, because mould machining and trial scheduling are physical time, and the 1 to 2 week prototype stage is hard to shorten either.
The single most effective action is a requirements lock-in meeting before kick-off, settling the battery solution, button count, interface types, target cost and certification list. Half a day there saves one to two weeks later.
The second is bringing the structural engineer into the appearance review early. Handing the design over only after the appearance is finalised means a week lost whenever an interference is found and the appearance has to change.
The third is running tooling and certification in parallel: use the T1 parts for a baseline certification screening test while the mould shop keeps revising. What cannot be saved should be stated plainly, including mould machining days, trial scheduling, injection cooling and secondary operations. When negotiating lead time with a mould shop, writing the revision rounds into the contract works better than chasing by phone.
Stage 4: How Design Fees Relate to the Timeline
The core answer: our quotes come in three tiers. Appearance design alone 5,000 to 12,000 RMB; appearance plus structural design 15,000 to 40,000 RMB; the full package covering appearance, structure, CMF and tooling follow-up 30,000 to 80,000 RMB. More revision rounds and a longer follow-through to trial production both raise the fee.
Mould cost is separate and is paid directly to the mould shop, not included in the design fee. For small appliances we have seen anything from tens of thousands to over a hundred thousand RMB, depending on part count and the number of cavities.
Sixty-five percent of our clients are repeat customers, and we have worked on more than 320 products. The pattern is consistent: the few hours spent up front defining requirements, certification and cost targets are worth more than chasing the mould shop ten times later.
What Designers Can Take Away
Four stages, 10 to 20 weeks. Appearance 2 to 4, structure 3 to 6, prototype 1 to 2, tooling 4 to 8.
Two bottlenecks dominate. Structural review rounds at 3 to 7 days each and mould revisions at 1 to 3 weeks each.
Run certification in parallel with tooling. Three to six weeks submitted after the mould is finished is a month lost.
Compress the front, not the physical time. Lock the requirements, bring structure into the review early, and write revision rounds into the mould contract.
FAQ: Design to Production Questions
Q1: How long does product design to mass production take?
A: 10 to 20 weeks, about two and a half to five months. Appearance 2 to 4 weeks, structure 3 to 6 weeks, prototype 1 to 2 weeks, tooling 4 to 8 weeks. Products with batteries or certification requirements sit at the 20-week end.
Q2: What does appearance design alone cost and take?
A: 5,000 to 12,000 RMB over 2 to 4 weeks. With structural design it is 15,000 to 40,000 RMB, and a full package with tooling follow-up is 30,000 to 80,000 RMB. Quotes move with product complexity and how far the follow-up goes.
Q3: Why does structural design take longer than appearance design?
A: More parts, plus coordination with moulding processes and standard-part purchasing, which is normally 3 to 6 weeks. For a 30 to 60 part product, assembly drawings, part drawings, snap fits and screw bosses plus supplier confirmation make four to five weeks routine.
Q4: How long does tooling take, and can it be rushed?
A: 3 to 5 weeks from frozen 3D to the T1 trial shot, 4 to 8 weeks including revisions. Rushing depends on the mould shop's machine schedule, and peak season is hard to squeeze. Writing revision rounds into the contract is more effective than chasing.
Q5: Can a product be finished in three months?
A: Yes, with everything in place: requirements locked in one pass, no more than two review rounds, no queue at the mould shop, and certification running in parallel with tooling. Miss one and three months will not hold.
Hertz Industrial Design (Dongguan, China) works across product appearance design, structural design, CMF and tooling follow-up, and more than 320 of its designs have reached mass production. Website: www.hezidesign.com.
Originally published on the Hertz Industrial Design website (hezidesign.com), Company News column.
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