Operation Breakdown of a Leggings for girls with SMV and Production Target

Introduction: Legging is a type of tight-fitting bottom wearable dress, mostly wear by girls and women. It is very tight trousers made from a nylon-lycra mixture (generally 90% nylon, 10% lycra)  and cotton lycra or a mixture of cotton polyester-lycra that stretches easily and fits very closely to their legs.

There are also available leggings for men which slightly different than girls leggings. The legging of the female has a gusset sewn. But Male has a junk pocket, so it isn't flattened. Men leggings are known as meggings. 

Different Parts of Girls Leggings

In this article, we learn Operation Breakdown of Leggings with SMV and Production Target.

Common parts of leggings: 

1. Front Raise. 
2. Back Raise. 
3. Waist Belt.
4. Waist Belt Elastic.
5. Inseam.
6. Leg Hem.

Operation Breakdown of a Leggings for girls: Operation Breakdown of a Leggings is done by the following table;

SL. No.	Name of Operation	Cycle Time	Calculated Production at 100% Efficiency
1	Care label Attach	0.20	300
2	Front Raise Join	0.28	214
3	Back Raise Join	0.28	214
4	Inseam Join	0.55	109
5	Elastic Measure and Cut	0.30	200
6	Elastic Join With Waist Belt	0.40	150
7	Waist Belt Fold and Sewing	0.38	168
8	Waist Belt Tack	0.20	300
9	Leg Hem fold and stitching	0.50	120
10	Crotch Point and Leg Hem Tack	0.52	115
11	Final Thread Cut	0.40	150
	Total Cycle Time	4.01

Table - 1: Operation Breakdown of a Leggings.

From the above table, we get operation breakdown and total cycle time. We also estimate each operation production target which helps us line balancing and preparing machine layout.

You may like: Operation Bulletin of a Leggings for girls with Machine Layout Plan.

SMV calculation of a Leggings: 

Problem: From the above table, we find total cycle time is 4.01 minute, suppose the performance rating of all operator is 85% for Leggings. Now, Find out the SMV for that Leggings. 

Solution: 

We know,

SMV = Basic time + Allowance

          = (Cycle time × Rating) + (Bundle allowances + machine and personal allowances)

          = (4.01× 0.85) + (Bundle allowances + machine and personal allowances)

          = 3.41 + ( 4.01 × 10%)+ (4.01× 20%)

          = 3.41 + 0.401 + 0.802

          = 4.61

So, we find out SMV for that Leggings is 4.61 minute.

Production target calculation of a Leggings:

Problem: We find SMV for that Leggings is 4.61 minute. Suppose, No. of worker of that line is 17, the efficiency of that line 80%.  Find out the production target per day of that Leggings in one sewing line.

Solution: 

Here,

SMV = 4.61 Minute.

No. of worker = 17.

Line efficiency = 80% = 0.80

We know, Total working hour in a day = 8 hr.

Now, 

Production Target = {(Total manpower per line × Total working min per day )/ S.M.V.} × Efficiency

                                  = { (17 × 8 × 60) / 4.61 } × 0.80

                                  = 1416.05~ 1416

                                  = 1416 pieces.

So, Daily production target = 1416 pieces in one sewing line

and Hourly production target = 1416 / 8

                                                       = 177 pieces / hr.
                                                       = 177 Pieces/hr in one sewing line.

Different Part of Leggings

So, From this post, we learn about Operation Breakdown of Leggings, Total Cycle Time, SMV calculation, and Production target in daily and hourly.

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