How to Calculate Cost of Manufacturing Apparel Products

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Formula used for calculating garment cost.

Estimating correct manufacturing cost is essential for a successful business. You might be preparing garment cost sheet and need to find manufacturing cost per garment. But don't know exactly how to do it and don't have full confidence calculating the same. Don't worry. Read this post and learn the basic method of determining Cost of Manufacturing (CM) of apparel products.

Cost of manufacturing can be defined as the cost incurred by the factory to run the factory making garments. Factory running cost includes direct labor cost and manufacturing overhead. Here manufacturing overheads are indirect workers wages, staff salary, power and fuel cost, repair and maintenance cost, factory rent, administration cost etc. This cost is also known as operating cost. Cost of Manufacturing is determined for per unit garment.

There are two ways to find Cost of Manufacturing (CM) for a particular style/order. 

  1.  Based on Standard Time (SAM) of the product
  2.  Based on Daily Production Average

1. CM Calculation Based on Standard Time (SAM) of Product Making


To get better accuracy in cost estimation one should prefer this procedure. But to many small size companies no such resources available to measure product SAM and data for the following parameters. Following parameters are essential for cost calculation in this method.

  1. Product SAM: Standard time of the garment. Standard time of a garment is measured by using Time Study and using synthetic data
  2. Target Efficiency:  Target efficiency percentage is at what % you are expecting running a specific product and order quantity. 
  3. Operating Cost per day/machine - Operating cost is factory running cost. Operating costs are all cost incurred to run the business other than material cost. Calculate monthly operating cost and then calculate daily operating cost. Calculate per machine operating cost.
Formula:
Cost of Manufacturing = (Operating cost per day per machine* SAM)/(Target Efficiency% * Working hours * 60)

In the following table an example is shown for calculating manufacturing cost using SAM and Daily Production figure. 

Table-1: Calculation of Cost of Manufacturing

In the  above example, garment SAM is 21 minute, target efficiency 60%. So, actual time would be 35 minute to make a garment. Factory works 8 hours in a day and operating cost per day per machine is Rs. 1022.
Cost of manufacturing is Rs. 74.52


2. CM Calculation Based on Daily Production Figure


This method is widely used by garment manufacturing factories. Cost of Manufacturing  calculation is done based on historical production data. This is an easier method compared to above one.

Information needed to find Cost of Manufacturing
  1. Daily production: Find average daily production of a particular style (garment) based on earlier (historical) production figures. Calculate daily average production of the factory. 
  2. Manpower involved in production: How many sewing machines or sewing operators are utilized to produce above quantity. 
  3. Operating cost per day/machine: As explained above.

Formula
Cost of Manufacturing = (Operating cost per Day / Total garments to be produced per day)

See the example method -2 in the above table. In the example, daily product is 550 pieces. 40 operators worked to produce these pieces. Operating cost per machine is Rs. 1022 per day. 

So cost of manufacturing is Rs. 74.33

P.S. Data used in the above examples are hypothetical.


Also read: Actual Garment Production Cost -the way factory calculates it.

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Online Clothing Study: How to Calculate Cost of Manufacturing Apparel Products
How to Calculate Cost of Manufacturing Apparel Products
Formula used for calculating garment cost.
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