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

**Mayedul Islam**

Merchandiser at Fashion Xpress Buying House.

Badda, Dhaka, Bangladesh.

Email: [email protected]

**Introduction:**

Standard Allowed Minute or Standard Minute Value (SAM or SMV) is an important factor in ** garments manufacturing **industry. 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 **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 by 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 the 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 operator will complete, then industrial engineer should follow the same activities of operator again to check the noted activities that the note is ok or not.

Now, industrial engineer should list down all the activities of operator in sequentially and refer the synthetic data for TMU (time measuring unit) values. Suppose, industrial engineer got TMU value for that operation is 450. Now he should convert total TMU into minutes, where (1TMU= 0.0006 minute). 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 time study.

Here, industrial engineer should take a stop watch and stands near the m/c operator. Capture cycle time for that operation (that he chosen early). Cycle time means “total time needed to complete full operation”. He should be done this process consecutively at least for 5 cycle times. Then he should calculate mean cycle time by adding 5 cycle times and divided those by 5. Finally 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 with m/c operator. In which speed, operator completed his duty. It’s determined by industrial engineer. 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 minute.

Please send us like technical aspects like industrial engineering and various types of garment costing to my email is as mentioned above

how to TMU be calculated?

How to TMU be calculated

Dear All,

I am Anjum from Pakistan, and I manufacture different kinds of Railing and Hanging systems for Garment & Textile industry. This helps to reduce your handling time & maintains your SAM.

Thanks

U make the same for simple backpacks, and complicated ladies handbags. 100,000 units per item per color.

Pius.

good n i will put in to my factory