Estimating Labor Hours: Time Studies & Production Standards

Why Labor-Hour Estimating Matters

Material cost is easy to measure—you count yards and multiply by price. Labor is harder because time varies with the worker, the task complexity, and the shop setup. Underestimate labor and you lose money on every job. Overestimate and your quote is too high to win work. Accurate estimating is a core competency tested by both the Custom Tailors & Designers Association (CTDA) and the Marine Fabricators Association (MFA) Master Fabric Craftsman credential.

What a Time Study Is

A time study breaks a job into discrete, repeatable tasks and records how long each task takes under normal working conditions. Industrial engineers developed the method over a century ago; the sewn-products trades adopted it to set production standards—the expected time a skilled worker needs to complete a defined operation.

A production standard is usually expressed in standard minutes (SM) or standard hours (SH) per unit. Once you know the standard, you can price labor by multiplying standard hours × shop labor rate.

The Basic Process

1. Define the task list. Break the job into operations small enough to time individually—for example, "lay and cut one pattern piece," "sew one flat-felled seam," or "staple and stretch one seat panel."

2. Observe and record. Watch a trained worker perform each operation several times. Record actual elapsed time on a time-log form.

3. Apply a performance rating. A worker moving faster or slower than normal pace is rated accordingly (for example, 90 % of standard pace). Multiply observed time by rating factor to get normal time.

4. Add allowances. Standard practice adds a percentage for personal time, fatigue, and unavoidable delays. Common allowances in light-manufacturing sewn products range roughly from 10 % to 20 % of normal time, depending on shop policy and task type. Check your employer's or MFA's current guidance for the allowance factor used in your shop.

5. Sum the operations to get the total standard time for the job.

Reading Industry Reference Ranges

Trade publications and MFA guidance materials publish reference ranges—not exact numbers—because individual shops differ in equipment, layout, and skill level. A reference range might state that installing a marine zipper takes between X and Y minutes for a journeyman-level craftsperson. Your observed time should fall inside that range for a competent worker. If it falls outside, investigate why: Was the worker interrupted? Was a specialty zipper foot unavailable? Was the fabric unusually heavy?

Safety in a Timed Observation

Before any live demonstration, confirm the following:

• PPE: Observer and demonstrator both wear safety glasses when cutting. Finger guards or a cut-resistant glove should be available for rotary cutter use.
• Machine guarding: Verify the sewing machine needle guard and presser-foot guard are in place before the demonstration begins. Never disable guards to speed up a timed run.
• Lockout/tagout awareness: If any machine requires adjustment mid-demo (such as changing a presser foot), the operator must stop the machine and follow the shop's lockout/tagout procedure before reaching near the needle or feed dogs. Timing pressure should never override this step.
• Staple gun safety (upholstery tasks): Point the staple gun away from all persons. Keep the safety engaged until the gun is positioned on the workpiece.
• Clear work area: Remove tools and materials not needed for the current operation so the demonstrator—and observer—cannot trip or knock items onto the machine.

Building Your Estimate

Once you have timed all operations and applied the rating and allowance factors, list each operation, its standard time, and the quantity of times it repeats in the job. Multiply and sum.

Marine dodger example structure:

• Pattern layout and cutting (multiple pieces)
• Seaming side panels
• Installing clear vinyl window panels
• Adding zippers and closures
• Installing bimini hardware attachment points

Tailored trouser alteration example structure:

• Seam removal and pressing
• Re-cutting altered seam allowance
• Re-sewing inseam or outseam
• Pressing finished seam

Foam-cut dining chair cushion example structure:

• Foam measurement and cutting
• Fabric cutting
• Sewing cover (boxing strip, zipper, top and bottom panels)
• Stretching and inserting foam

Add all operation times in each job, then compare your total to the instructor's standard. A total within 15 % of that standard is considered acceptable for this exercise, matching the tolerance used in many trade-costing contexts.

When Your Estimate Misses by More Than 15 %

A gap larger than 15 % on any line item signals a variable you did not account for. Common causes include: the demonstrator working faster or slower than a journeyman pace, a different machine or presser foot than expected, unusually thick or slippery fabric, or an operation you forgot to time separately. Write a clear one-sentence explanation—this habit is exactly what shop estimators do when they review bids after the job is complete.