Reporting and Data Analysis of Overtime Work in Garment Manufacturing

When a factory works more than the regular shift hours in a day, the extra hours are considered as overtime work. In India, 8 hours per day excluding the break time and 6 days week are considered the normal working hours. When a worker works more than 8 hours in a day or more than 48 hours in a week, those additional hours are counted as overtime working hour (OT hours).

For an example, in a garment manufacturing factory,
Normal working hours: 9:00 a.m. to 5:30 p.m. (30 minutes lunch break is included).
Overtime working hour starts after 5:30 p.m. If a factory works till 7:30 p.m., daily overtime work will be 2 hours.
Before starting the overtime work, factories give 10-15 minutes break. Including the break-time shift is extended up to 7:45 pm. The factory shift start time, lunch break duration and shift close time may vary from factory to factory.

As per the Factories Act 1948, every adult (a person who has completed 18 years of age) cannot work for more than 48 hours in a week and not more than 9 hours in a day. According to Section 51 of the Act, the spread over should not exceed 10-1/2 hours. (source:

I have written this post to guide one engineer, who asked me this question. What MIS report should I prepare for the overtime working hours, so that management can understand and clear. I want to show our management that overtime working is not beneficial for the factory.

Earlier, I had posted an interview article on overtime work - does it cost effective to a factory? where some essential points were discussed.

Let me come to the question. MIS reports for overtime work hour tracking and data analysis of the KPIs effected by the Overtime working hours. Overtime hours simply called as OT hours. You can do the following data analysis. In the data analysis, I have taken hypothetical data for showing you examples how you can do the comparative analysis. To learn more continue reading.

Overtime working report and data analysis

The first and foremost thing you should do is prepare a detailed report of the overtime hours worked in your factory. Whether the overtime was planned one or a sudden need for overtime work, include it in your overtime report. The report can be simply captured in a register by the production writer. Or the industrial engineering department can keep daily overtime hours record. In practice, factories prepare a list of workers who will be doing overtime and the list is signed and approved by the factory manager (or by an authorised personnel). I had observed this practice in many factories. If you are following the same OT approval method, overtime hour calculation will be easier.

By capturing the data, prepare a detailed report, weekly overtime hours, monthly overtime hours and percentage of overtime compared to regular working hours.

Fig-1: OT work hour report
To get more insights of the factory overtime working hours and its impact on the garment cost, I would suggest you capture additional information for regular hours and OT hours as listed below (if you are not capturing this information), like
  1. Line wise daily production, 
  2. Daily working hours, 
  3. Daily manpower, 
  4. Daily produced SAH and 
  5. Daily Line efficiency in Regular hours, OT hours and the whole day 
Start capturing such data and keep for data analysis. A sample data capturing format including this information are shown in the below image. You can download the sample template for preparing your overtime report.

Fig-2: The detail data capturing and data analysis report template

You can further analyze the stitching quality data of the regular hour work and overtime work hours.

List down the reason for overtime working

When a factory is doing overtime, you should know why overtime is required. Are you doing it just to meet the daily production target or you need to complete the production of a certain order as it is getting delayed due to some uncertain reasons. Whatever it is, make a note for analysis. From my observation, I have listed a few points he
  • Non-availability of cuttings and fabric in the day and production need to be completed by the date
  • Non-availability of the trims 
  • Overbooking of orders
  • Shortage of special machines and machine breakdown 
  • Low productivity 
  • Stitching quality issues
  • Change of production plan 
  • Need for completing a delayed order
If it is a regular practice of doing 2 hours of overtime, then you need to improve your planning. Most cases workers slow down the production rate at the regular hours and so that factory work for overtime. By doing this an employee can earn extra money on daily basis.

Comparative analysis of cost per pieces with overtime and without overtime work:

Production cost per piece is one of the Production KPIs. Calculate production cost in both scenarios - when you are doing over time and paying the double payment for overtime hours and paying money for food to employee and staff. If your factory does not pay double overtime, consider single payment for calculative extra expenses.
Fig-3: Labour Productivity data comparison 

This chart will show your management, that overtime work cost to the factory. As the cost per piece increase when you do overtime work. Note, for some cases overtime work can be considered, to avoid penalty of late shipment. That overtime should be pre-planned.

Comparative analysis of the line productivity with overtime work and without overtime work

As mentioned above capture daily working hour - regular hours and overtime hours, daily production - in regular hours and in overtime hours. Prepare comparative analysis report using these data.

In this example (Fig-4), average labour productivity reduction of 6 lines is 7% when the factory does the overtime for two hours a day. The above comparative analysis shows that labour productivity goes down when you do excess overtime.

Line Efficiency data comparison

Compare the line efficiency in the regular hours and line efficiency including OT hours production. See an example of the same in Fig-5.

Fig-5: Line efficiency data comparison

Negative effects of excessive overtime work

Overtime can be beneficial for both employees and companies. It provides the company with the flexibility to cover unexpected absences and changes in demand without hiring more staff and it gives employees extra income at a premium rate. However, overtime has its downsides too. While many employees will happily take as much overtime as is available, there is growing scientific evidence that relying too much on overtime can lead to numerous problems for an operation. (

The negative impacts of too much overtime to the employees and to a factory are listed in the five categories.

  • Increased health problems
  • Increased safety risk
  • Decreased productivity
  • Increased absenteeism
  • Increased worker turnover Rates

Management would not like to be rthe eason for the above problem for the employees. The above statements are given considering the non-garment manufacturing industry. So, the last two statements may differ when we are talking about the garment industry. Many workers prefer working in a factory where they get a chance of earning more money. Overtime working is considered one of the ways of earning extra money for them. But the first 3 statements will imply to garment factory employees.

If you look at the factory compliance, regular working per week is 48 hours. If you are working more than 48 hours in a week you are not abiding by the compliance rule. So, you may need to hide your actual working hours in your reporting and payroll. This is considered an unethical practice.

How to reduce and eliminate overtime?

If you are in favour of not doing overtime, as you know there are many negative impacts to the workers, you need to find out alternative ways that help you meet your daily production target, avoiding urgency of production completion, and increasing employees’ daily earning. Prepare a note on how you will be managing all these three challenges after eliminating over time.

#1. Increase daily earning: 

Daily earning can be increased by providing performance incentive and attendance bonus. Incentive bonus scheme can be designed for an individual operator as well as for a group. In the group incentive system, all operators working in the same line and making the same style as a group will be eligible for incentive earning if their line output meets the target production qty. In individual incentive bonus system, whether the line meets the target, an operator can earn incentive if their individual efficiency reaching the target efficiency level.

By providing an attendance bonus to the employee, a factory can gain many other benefits in daily production and line balancing. You can proof this by using your actual data.

#2. Improve Labour Productivity

Daily production target can be reached by improving labour productivity. Productivity can be increased by introducing a performance incentive scheme and managing the production line well. There are many reasons for the low productivity. If you are an industrial engineer, you might be already knowing why daily production is low in your factory.

You need to list down the possible ways that can be implemented on the shop floor based on your order and present status. Prepare a report for before and after implementation result and show it to your management. They will understand it is possible to meet the daily production target by working on regular shift hours.

> 20 ways to improve the productivity in garment production

#3. Manage Production Delay

Thinking of how to manage the production delays. A good planning, production scheduling and execution of the schedule are required to avoid the delay. Order execution should be done from sample approval, fabric sourcing and order planning. It is often found that in a factory, due to the communication gap and coordination issue between departments, things are getting delayed. You can use the production scheduling and production execution tool for managing orders and reduce the delay in process completion.

Prasanta Sarkar

Prasanta Sarkar is a textile engineer and a postgraduate in fashion technology from NIFT, New Delhi, India. He has authored 6 books in the field of garment manufacturing technology, garment business setup, and industrial engineering. He loves writing how-to guide articles in the fashion industry niche. He has been working in the apparel manufacturing industry since 2006. He has visited garment factories in many countries and implemented process improvement projects in numerous garment units in different continents including Asia, Europe, and South Africa. He is the founder and editor of the Online Clothing Study Blog.

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