Time Study in Garment Manufacturing: A Complete Guide

Time study is an important part of garment manufacturing. It helps factories measure how long workers take to complete different operations. As a result, manufacturers can set realistic production targets and improve sewing efficiency.

Every garment requires several operations. For example, a T-shirt may need shoulder stitching, sleeve attachment, side seam stitching, and hemming. Each operation takes a different amount of time.

Therefore, manufacturers need to understand the time required for each task. In this guide, you will learn what time study is, how it works, how to calculate standard time, and how it improves garment production.

What Is Time Study in Garment Manufacturing?

Time study is a method used to measure the time required to complete a specific operation. In garment manufacturing, it helps industrial engineers understand how long each sewing task should take under defined working conditions.

For example, an operator may need 30 seconds to attach a sleeve to a garment. An industrial engineer observes the operation and records its completion time.

However, one observation may not provide an accurate result. Therefore, the engineer measures the operation several times and calculates an average.

The engineer may also consider the operator’s working pace and necessary allowances. This helps establish a realistic standard time for the operation.

Why Is Time Study Important?

Time study helps garment manufacturers make better production decisions. It also provides useful information for improving factory performance.

1. Helps Set Production Targets

Factories need realistic targets for every shift. Time study helps managers estimate how many garments a worker or sewing line can produce during available working hours.

As a result, production teams can plan their daily output more accurately.

2. Improves Sewing Efficiency

Time study helps identify operations that take longer than expected. Managers can then review the working method, machine settings, or operator training.

These improvements can reduce unnecessary delays. Learn more in our guide on how to improve sewing efficiency in garment manufacturing.

3. Identifies Production Bottlenecks

Some sewing operations take longer than others. Consequently, garments may accumulate at certain workstations.

Time study helps identify these slow operations. Managers can then adjust workloads and improve the flow of garments through the sewing line.

4. Supports Better Labour Planning

Manufacturers need to know how much work their available operators can complete. Time study provides useful data for assigning workers and planning production schedules.

Therefore, managers can distribute work according to operation times and operator skills.

5. Helps Control Manufacturing Costs

Labour time affects the cost of producing a garment. When manufacturers understand the time required for each operation, they can estimate production costs more accurately.

In addition, they can identify tasks that need improvement to reduce wasted time.

How Does Time Study Work in a Garment Factory?

A time study follows a clear process. Industrial engineers observe operations, record times, and use the results to establish production standards.

Step 1: Select the Operation

First, select the operation you want to study. It could be collar attachment, sleeve stitching, pocket attachment, or bottom hemming.

Choose an operation with a clear starting point and finishing point. This makes it easier to measure the time accurately.

Step 2: Observe the Operator

Next, observe the operator performing the selected task. Check the machine, materials, working method, and workstation arrangement.

The operator should follow the approved method for that operation. Otherwise, the recorded time may not represent normal production conditions.

Step 3: Record the Operation Time

Use a stopwatch or suitable time-study software to record the operation time. Observe several cycles rather than relying on one measurement.

For example, an operation may take 28, 30, 29, 31, and 32 seconds across five observations.

Recording several cycles helps reduce the effect of unusual delays or variations.

Step 4: Calculate the Average Observed Time

Add the recorded times and divide the total by the number of observations.

Using the example above:

Total observed time = 28 + 30 + 29 + 31 + 32 = 150 seconds.

Number of observations = 5.

Average observed time = 150 ÷ 5 = 30 seconds.

Therefore, the average observed time for this operation is 30 seconds.

Step 5: Assess the Working Pace

An industrial engineer may assess the operator’s working pace against a defined normal performance level.

This assessment is called performance rating. It helps adjust observed time when the operator works faster or slower than the defined normal pace.

For example, an observed time of 30 seconds at a performance rating of 100% gives a basic time of 30 seconds.

However, a performance rating of 110% would produce a basic time of 33 seconds using the conventional rating formula.

Performance rating requires trained judgment. Therefore, it should be applied consistently.

Step 6: Add Necessary Allowances

Workers need time for personal needs, rest, and unavoidable delays. Therefore, the standard time should include suitable allowances.

The allowance depends on the factory’s policy, working conditions, and the method used to calculate standard time.

Once the basic time and allowance are established, the industrial engineer can calculate the standard time for the operation.

What Is Standard Time in Garment Manufacturing?

Standard time is the time allowed for a trained operator to complete a defined operation using the specified working method under stated conditions. It includes the appropriate allowances.

Factories use standard time to estimate production capacity, set targets, and plan workloads.

For example, suppose the basic time for attaching a sleeve is 40 seconds. The factory applies a 10% allowance based on basic time.

Allowance = 40 × 10% = 4 seconds.

Standard time = 40 + 4 = 44 seconds.

Therefore, the standard time for this operation is 44 seconds under this allowance convention.

It is important to use one consistent calculation method. Some systems calculate allowances as a percentage of total standard time, which requires a different formula.

How to Calculate Standard Time

Manufacturers can use a simple formula when allowances are calculated as a percentage of basic time.

Standard Time = Basic Time + Allowance

First, calculate basic time using the observed time and performance rating.

Basic Time = Average Observed Time × Performance Rating

Use the performance rating as a multiplier. For example, a rating of 110% becomes 1.10.

Now consider a sewing operation with an average observed time of 50 seconds and a performance rating of 100%.

Basic time = 50 × 1.00 = 50 seconds.

If the allowance is 10% of basic time, the allowance equals 5 seconds.

Standard time = 50 + 5 = 55 seconds.

Therefore, the standard time is 55 seconds.

These calculations help manufacturers create consistent operation standards. However, the final standard should reflect the actual working method and approved factory allowance policy.

What Is the Difference Between Time Study and Line Balancing?

Time study and line balancing are closely related, but they serve different purposes.

Time study measures how long individual operations take. It provides the time data needed to understand each task.

Line balancing distributes operations across operators and workstations to create a smoother production flow.

For example, a time study may show that sleeve attachment takes longer than several other operations. A line-balancing review can then help managers decide how to distribute the work.

Read our guide to garment line balancing to understand how factories balance workloads and reduce production bottlenecks.

Together, these methods help manufacturers improve production efficiency.

How Time Study Supports Production Planning

Production planning depends on accurate information about working time and production capacity. Time study helps managers estimate the time needed to complete an order.

For example, if a garment has a known standard time, planners can estimate the total standard minutes required for the order. They can then compare this requirement with available labour time.

This information helps managers set delivery schedules, allocate workers, and identify potential production problems.

Time study also supports better coordination between cutting and sewing departments. When production teams understand their time requirements, they can plan material flow more effectively.

For more information, read our garment production planning guide.

For an apparel brand reference, visit BLANKA Apparels.

How Cutting and Pattern Making Affect Time Study

Time study focuses on operation time, but upstream processes can also affect sewing performance.

For example, poorly cut garment pieces may require extra handling or cause alignment problems during stitching. These issues can increase the time needed to complete an operation.

Accurate cutting helps ensure that garment components reach the sewing line in the correct size and shape. Learn more in our step-by-step guide to the garment cutting process.

Similarly, accurate patterns support consistent garment construction. Incorrect pattern shapes or measurements can lead to sewing difficulties and rework.

Our beginner’s guide to garment pattern making explains the role of patterns in clothing production.

By improving these processes, factories can reduce avoidable problems during sewing and obtain more reliable time-study results.

Common Time Study Mistakes to Avoid

Time study is useful only when measurements are collected and applied carefully. Some common mistakes can lead to unrealistic production standards.

Measuring Too Few Cycles

One observation may not represent the usual operation time. Therefore, engineers should record enough cycles to understand normal variation.

Ignoring the Approved Working Method

Operators should perform the operation using the correct method. Otherwise, the recorded time may not match the actual production standard.

Applying Performance Ratings Inconsistently

Different ratings can change the calculated basic time. Engineers should use a consistent method and appropriate training when assessing operator performance.

Forgetting Allowances

Workers need reasonable allowances for personal needs, rest, and unavoidable delays. Ignoring these factors can create unrealistic standards.

Setting Unrealistic Production Targets

Production targets should reflect standard time, available working minutes, operator numbers, and working conditions. Targets that ignore these factors may increase pressure without improving actual productivity.

Failing to Review Standards

Working methods, machines, and garment styles can change. Therefore, factories should review time standards when significant changes occur.

How to Use Time Study Results Effectively

After completing a time study, manufacturers should use the results to improve daily production.

First, share the approved operation times with relevant production managers. Then, compare actual performance with the established standards.

If an operation takes longer than expected, investigate the reason. The cause may be machine performance, material handling, operator training, or an unsuitable workstation layout.

Next, make practical improvements and observe the results. Continue reviewing performance to ensure that the changes support both productivity and garment quality.

Time-study data should guide improvement rather than simply pressure workers to work faster.

Conclusion

Time study is an important tool in garment manufacturing. It helps factories measure operation times, calculate standard time, and establish realistic production targets.

Moreover, it supports sewing efficiency, labour planning, and production scheduling. When manufacturers combine accurate time study with line balancing and effective production planning, they can identify bottlenecks and improve workflow.

For the best results, factories should use consistent measurement methods, include appropriate allowances, and review standards when working conditions change. This approach supports better productivity while maintaining garment quality.