How to Calculate Standard Allowed Minutes (SAM or SMV) in Garments Industry

How to Calculate Standard Allowed Minutes (SAM or SMV) in Garments Industry?

Standard Allowed Minute or Standard Minute Value (SAM or SMV) is an important factor in the garments manufacturing industry. The production rate can be calculated by using it. But Standard minutes (SAM or SMV) estimation is not a tough task that we have normally seemed. As its importance on the readymade garments industry, today I will present here the estimation method of SAM or SMV.

Calculation Method of Standard Minute (SAM or SMV) in Apparel Industry:

An industrial engineer should follow the below formula for calculating SAM or SMV.

SAM = (Basic minute + Bundle allowances + Machine and Personal allowances)…… (1)

Normally bundle allowances should be added 10% with basic time and Machine and Personal allowances added 20% with basic time.

The main thing here, the determination of “Basic minute”. It can be done in two ways. Both ways have discussed in this article.

Method-01:
In this case, SAM or SMV Calculation can be done by using synthetic data. At first, an industrial engineer has to fix an operation, for which he wants to estimate SAM or SMV.

Here, he should stand near the m/c operator and follow every working procedure for the selected operation. He should note all the activities done by the operator (these activities are called synthetic data collection). When all the activities of the operator will complete, then the industrial engineer should follow the same activities of the operator again to check the noted activities that the note is ok or not.

Now, the industrial engineer should list down all the activities of operators sequentially and refer to the synthetic data for TMU (time measuring unit) values. Suppose, the industrial engineer got TMU value for that operation is 450. Now he should convert total TMU into minutes, where (1TMU= 0.0006 minutes). So for 450TMU= (450 × 0.0006) = 0.27minute. This minute is termed as Basic time.

So, now from equation-01, we get,

SAM or SMV = (Basic minute + Bundle allowances + Machine and Personal allowances)
= 0.27 + (0.27 × 10%) + (0.27 × 20%)
= 0.27 + 0.027 + 0.054
= 0.351minute

So, SAM or SMV value for that operation is 0.351 minute.

Method-02:
In this case, SAM or SMV Calculation can be done by using a time study.

Here, the industrial engineer should take a stopwatch and stands near the m/c operator. Capture cycle time for that operation (that he chose early). Cycle time means “total time needed to complete full operation”. He should be done this process consecutively at least 5 cycle times. Then he should calculate the mean cycle time by adding 5 cycle times and divided those by 5. Finally, the industrial engineer gets the cycle time here. (Let, cycle time here 0.50) Now, he should convert cycle times into basic time by multiplying with “performance rating”.

So, Basic time = Cycle time × Performance rating ………………. (2)

Performance rating:

Performance rating is related to the m/c operator. At which speed, the operator completed his duty. It’s determined by an industrial engineer in the clothing industry.

Let, the operator performance rating was- 70%.

So, from equation (2), we get,
Basic time = 0.5 × 70% [Cycle time= 0.5]
= 0.35

So, basic time= 0.35

By using equation- (1), now we get,
SAM or SMV = (Basic minute + Bundle allowances + Machine and Personal allowances)
= 0.35 + (0.35 × 10%) + (0.35 × 20%)
= 0.35+ 0.035 + 0.07
= 0.46 minute

So, SAM or SMV for that operation stands at 0.46 minutes.

Mayedul Islam

Mayedul Islam is a Founder and Editor of Garments Merchandising. He is an Expert in Garments Merchandising. Writing is his passion. He loves to write articles about Apparel, Textile and Garment Washing specially on Merchandising. Mail him at mayedul.islam66@gmail.com