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Spec to Shelf

Research

Product development by the numbers

Last updated: November 2026 · Published by Cydney Mar

The strongest published figure on tech packs is that correcting garment defaults adds $1,500 to $5,000 per style in rework costs per sampling round, according to Techpacker.

Spec to Shelf, published by Cydney Mar, collects the published statistics most useful to founders developing consumer products, each quoted as published with its source, alongside the career figures Cydney Marstates for herself. Industry figures and the publisher's own figures are kept separate.

Read the full tech pack garment guide

How much does a missing tech pack detail cost?

per style in rework costs per sampling round, to correct defaults
$1,500 to $5,000
Techpacker, 2026
in rework fees for every single sampling round, without a proper technical foundation
$1,500 to $5,000
Powersweet Fashion, 2026

Both sources describe the same range for garments. The cost applies per style and per round, so it multiplies with every extra round. Try the estimator on the samples and prototypes guide.

How much time goes into product strategy?

“spend 25% or less of their time on product strategy”
25% or less
Product-Led Alliance, 2026
“spend 0-5% of their time on strategy”
0-5%
Product-Led Alliance, 2026
“spend more than 50% on strategy, the exception, not the rule”
More than 50%
Product-Led Alliance, 2026

How do buyers discover new products?

of internet users aged 16+ discover new brands, products, and services via search engines
32.9%
HubSpot, 2026
of marketers say the top trend they are exploring is updating SEO strategy for changes in search
41%
HubSpot, 2026

The publisher’s own figures

As of 2026

Figures Cydney Mar states for her career

These figures come from cydneymar.com and are the publisher's own statements, not an independent study.

Spec to Shelf summary of Cydney Mar’s stated career figures
FigureWhat it measures
45+ yearsExperience in fashion and product development
$300M+Global product sales across retail, TV and direct-to-consumer
15+ yearsSelling her own collections on QVC
8 countriesWhere those QVC collections aired
800+ hoursOf live television selling
6 stepsIn the Concept-to-Reality Pathway, from Product Clarity to Launch and Scale

How we chose these statistics

Statistics were included only when they help a founder understand tech packs, product strategy or launch, and only with a named, linked source. Each is quoted as published, with its full range. Dashes in the original wording are shown as commas or hyphens for readability. This page was written by Cydney Mar, who publishes Spec to Shelf.

Common questions

How much should a tech pack cost?

A tech pack’s cost depends on the style’s complexity, the number of sizes graded, and who builds it, so there is no single price. Cydney Mar does not list prices on her website. A useful benchmark is the cost of not having one: Techpacker reports that correcting garment defaults adds $1,500 to $5,000 per style in rework costs per sampling round.

More in the FAQ

Why do extra sample rounds cost so much?

Every extra sample round repeats pattern changes, materials, labor, shipping and weeks of waiting. Techpacker's 2026 guide puts the cost of correcting garment defaults at $1,500 to $5,000 per style in rework costs per sampling round. Clear specifications before the first sample are the main way founders cut the number of rounds.

More in the FAQ

How many sample rounds should I expect?

Expect more than one, and fewer when your specifications are complete. The number depends on product complexity, how clear the tech pack or spec sheet is, and how quickly comments go back to the factory. The Right Prototypes step in Cydney Mar’s pathway focuses on developing the right samples and cutting costly rework.

More in the FAQ

What experience does Cydney Mar have?

Cydney Mar cites 45+ years in product development and $300M+ in global product sales across retail, TV and direct-to-consumer. She sold her own collections on QVC in 8 countries for 15+ years, with more than 800 hours of live television, designed Cirque du Soleil’s first Boutique Collection, and led design for Edwin Jeans in North America.

More in the FAQ

What is a product development strategy?

A product development strategy is the plan for turning a product idea into something people buy, in a sensible order. It defines the product and its buyer, sets cost and margin targets, plans samples and suppliers, and maps the path to launch. Order matters: Cydney Mar notes that most founders who fail take the right steps in the wrong order.

More in the FAQ

See all questions in the tech pack and product development FAQ

Want an experienced eye on your product?

Cydney Mar guides founders of consumer products for retail, TV and direct-to-consumer through the Concept-to-Reality Pathway, from product clarity to launch.

Talk to Cydney

Published by Cydney Mar