Operation Breakdown of Ladies Sports Bra with SMV and Production Target

Introduction: A bra, brassiere short is a shape-fitting undergarment designed to support and cover the breasts of the wearer. Bras are made for a variety of purposes, including increasing the breast size of a woman, producing cleavage or other cosmetic, style or practical requirements.

When women work out, more pressure and impacts are put on their breasts than during their daily activities. The movement and bouncing of women's breasts can create a force of up to 5 times their actual weight. Wearing a sports bra provides them the support and comfort they need to do physical activity.

Sport Fitting Bra

Common parts of Swimwear: 

1. Front part
2. Back Part
3. Back Yoke 
4. Neck
5. Armhole
6. Back Strap

Operation Breakdown of Ladies Sports Bra: Operation Breakdown of a Ladies Sports Bra is done by the following table;

SL. No.	Name of Operation	Cycle Time	Calculated Production
1	Match All Cut parts	0.30	200
2	Servicing Front Inner Part for Cuff Insert	0.23	260
3	Join Front Shoulder Panel with Front Part	0.29	206
4	Top Stitch to Shoulder Panel with Front Part	0.27	222
5	Join Outer Seam Left & Right Side	0.39	153
6	Join Outer Seam Left & Right Side	0.39	153
7	Stay Stitch at Inner Body With Outer Body All Around	0.27	222
8	Join Right Shoulder	0.16	375
9	Tack Extra Cloth at Back Neck	0.20	300
10	Attach Binding at Neck and Trim Binding Edge	0.36	166
11	Tack Straight at Neck	0.16	375
12	Join Left Shoulder	0.14	428
13	Tack Fold at Neck & Trim Thread	0.20	300
14	Attach Binding at Armhole Via Back Yoke	0.50	120
15	Mark and Tack Back Strap with Back Waist Elastic	0.46	130
16	Make Waist Elastic Ring	0.15	400
17	Attach Elastic at Waist	0.40	150
18	Top Stitch to Waist	0.27	222
19	Tack Back Strap Part With Back Waist	0.20	300
20	Bartack at Back Yoke	0.21	285
21	Make Label & Tack Label at Extra Cloth	0.55	109
	Total Cycle Time	6.10

Table - 1: Operation Breakdown of a Ladies Sports Bra.

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 Ladies Sports Bra with Machine Layout Plan.

SMV calculation of a Ladies Sports Bra: 

Problem: From the above table, we find total cycle time is 6.10 minutes, suppose the performance rating of all operators is 78% for Ladies Sports Bra. Now, Find out the SMV for that Ladies Sports Bra. 

Solution: 

We know,

SMV = Basic time + Allowance

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

          = (6.10× 0.78) + (Bundle allowances + machine and personal allowances)

          = 4.76 + ( 6.10 × 10%)+ (6.10× 20%)

          = 4.76 + 0.61 + 1.22

          = 6.59

So, we find out SMV for that Ladies Sports Bra is 6.59 minutes.

Production target calculation of a Girls Swimwear:

Problem: We find SMV for that Ladies Sports Bra is 6.59 minutes. Suppose, No. of workers of that line is 27, the efficiency of that line 85%.  Find out the production target per day of that Ladies Sports Bra in one sewing line.

Solution: 

Here,

SMV = 6.59 Minute.

No. of worker = 27.

Line efficiency = 85% = 0.85

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

                                  = { (27 × 8 × 60) / 6.59 } × 0.85

                                  = 1671.623~ 1672

                                  = 1672 pieces.

So, Daily production target = 1672 pieces in one sewing line

and Hourly production target = 1672 / 8

                                                       = 209 pieces / hr.
                                                       = 209 Pieces/hr in one sewing line.

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

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