Operation Breakdown of Men's Trouser

Today We will learn to prepare the Operation Bulletin of Men's Trouser in my industrial engineering tutorial series. You can refer to this operation breakdown or bulletin to learn about various operations involved, SMV and machine requirements in making Men's Trouser. 

A Men's Trouser is an easy style to produce in the sewing line. It has only very few complex processes. Here I describe the operation breakdown of the Men's Trouser with SMV and Machine names. 

Operation Bulletin of Men's Trouser is done by the following table. In this operation bulletin process list, estimated time, machine name, hourly production target quantity at 100% and 65% efficiency are shown. The estimated time (SMV) shown in the below table will vary according to the product method followed and machine and equipment used in actual production. So please be careful while you use the above estimated time against each operation.

Operation Bulletin of Men's Trouser

Operation Breakdown of Men's Trouser

SL.	Operation	Type of Machine	SMV	Target 100%	Target 65%
1	Front Rise Overlock	4T O/L	0.30	200	130
2	Front Sewing	SNLS	0.30	200	130
3	Front Rise Top Stitch	SNLS	0.30	200	130
4	Fly Round Top Stitch	DNLS	0.35	171	111
5	Bone Make	SNLS	0.30	200	130
6	Bone Attach at Upper Pocketing	SNLS	0.30	200	130
7	Pocketing Number Match	Manual	0.30	200	130
8	Upper Pocketing Attach	SNLS	0.40	150	98
9	Pocket Opening Top Stitch	SNLS	0.40	150	98
10	Facing Attach at Lower Pocketing	SNLS	0.35	171	111
11	Lower Pocketing Mark	Manual	0.30	200	130
12	Lower Pocketing Number Match	Manual	0.30	200	130
13	Lower Pocketing Tuck	SNLS	0.35	171	111
14	Pocket Bag Overlock	4T O/L	0.35	171	111
15	Pocket Bag False Sewing	SNLS	0.30	200	130
16	Inseam Facing Join	4T O/L	0.20	300	195
17	Inseam Facing Number Match	Manual	0.30	200	130
18	Inseam Facing Attach	4T O/L	0.55	109	71
19	Inseam Facing Top Stitch	SNLS	0.70	86	56
20	Heat Seal Label Attach	HEATSEAL	0.30	200	130
21	Facing Attach at Pocketing	SNLS	0.30	200	130
22	Pocketing Attach & Tab Attach	SNLS	0.35	171	111
23	Pocketing Top Stitch	SNLS	0.30	200	130
24	Pocket Bag Overlock	4T O/L	0.40	150	98
25	Velcro Attach	SNLS	0.55	109	71
26	Back Yoke Number Match	Manual	0.30	200	130
27	Back Yoke Join	4T O/L	0.35	171	111
28	Back Rise Join	4T O/L	0.30	200	130
29	Back Rise Top Stitch	SNLS	0.30	200	130
30	Heat Seal Label Attach	HEATSEAL	0.30	200	130
31	Flap Mark	Manual	0.30	200	130
32	Snap Attach at Flap	SNAP	0.65	92	60
33	Flap Sewing	SNLS	0.35	171	111
34	Flap Turn	Manual	0.30	200	130
35	Flap Top Stitch	SNLS	0.35	171	111
36	Flap Edge Cut	3T O/L	0.30	200	130
37	Cargo Pocket Rolling	SNLS	0.35	171	111
38	Facing Attach at Cargo Pocket	SNLS	0.35	171	111
39	Back Front Number Match	Manual	0.35	171	111
40	Side Seam Join	4T O/L	0.70	86	56
41	Care Label Attach	SNLS	0.30	200	130
42	Side Seam Top Stitch	SNLS	0.95	63	41
43	Cargo Pocket Placement Mark	Manual	0.65	92	60
44	Cargo Pocket Number Match	Manual	0.30	200	130
45	Cargo Pocket Iron	IRON	0.60	100	65
46	Cargo Pocket Attach Lower Side	SNLS	0.35	171	111
47	Cargo Pocket Attach	SNLS	0.70	86	56
48	Flap Number Match	Manual	0.30	200	130
49	Flap Attach	SNLS	0.35	171	111
50	Flap 1/4 Top Stitch	SNLS	0.35	171	111
51	W/B Ring Tuck & Mark	SNLS	0.35	171	111
52	Elastic Measurement & Cut	Manual	0.30	200	130
53	Elastic Ring Tuck & Mark	SNLS	0.35	171	111
54	W/B Mark & Punch	SNAP	0.35	171	111
55	Snap Attach At W/B	SNAP	0.35	171	111
56	W/B & Elastic Tuck	SNLS	0.70	86	56
57	W/B Rolling	MNCS	0.65	92	60
58	Trimming	Manual	0.35	171	111
59	W/B Number Match	Manual	0.30	200	130
60	W/B Attach	4T O/L	0.70	86	56
61	Tuck Remove	Manual	0.70	86	56
62	Main Label Attach	SNLS	0.30	200	130
63	Back & Front Bartack	B/T	0.35	171	111
64	Cargo Flap Bartack	B/T	0.35	171	111
65	Inseam Join	4T O/L	0.70	86	56
66	Inseam Top Stitch	SNLS	0.70	86	56
67	Bottom Rib Ring Tuck	SNLS	0.40	150	98
68	Rib Sewing	SNLS	0.40	150	98
69	Rib Mark & Number Match	Manual	0.35	171	111
70	Bottom Rib Attach	4T O/L	0.50	120	78
71	Bottom Rolling	3T F/L	0.50	120	78
72	Final Trimming	Manual	0.70	86	56
	Total		29.60

Full form of Machine Name:

In the above table a short name of sewing machines is written. Followings are the abbreviation of those short machine codes. 

SNLS - Single Needle Lock Stitch

DNLS - Double Needle Lock Stitch

3T O/L - Three Thread Over Lock

4T O/L - Four Thread Over lock

3T F/L - Three Thread Flat Lock

B/T - Bartack

Heat Seal - Heat Seal Machine

SNAP - Snap Button Machine

Manual - Helper

How to set the target per hour in the Sewing line of the Garment Factory?

It will be best to set the line layout target based on line efficiency, line cost and delivery date of the style.

Formula to set the 100% target:

Daily Target = (Worker x Working hour x 60/ SMV) x efficiency %

Basic Pitch Time (BPT) =Total SMV / Total Manpower

We can use “Ball Point needle or Sharp Point" Needle to stitch this item.

Single / Double  Needle Lockstitch   --- DB 1

Three / Four/ Five Thread Overlock    --- DC 21

Three Thread Flatlock                    --- UY 128

Bartack                                              --- DP 5

Eyelet Hole                                        --- DO 5 

Fabric Types and Needle Size Chart:

Fabric Types	Needle Size
Very fine fabrics (silk, chiffon, organza, voile, lace)	8, 9, 10
Light weight fabrics (cotton, heavier silks, synthetics, spandex, lycra)	11, 12
Medium weight fabrics (velvet, fine corduroy, linen, muslin, tricot, knits, fleece)	14
Heavy weight fabrics (denim, leather, canvas, suiting)	16
Very heavy weight fabrics (heavy denim, upholstery fabric, faux fur)	18, 19
Extra heavy fabrics	20, 21

Operation Bulletin makes our work easy to set up a production line in the apparel industry. We can easily manage machine and operator requirements for any sewing line by this. But it is necessary to do an operation breakdown to prepare a machine layout and line balancing by industrial engineering (IE). 

Visit here to know what is operation breakdown. You can visit my website to learn more about the bulletin or breakdown of garments. 

Thank you for your patience reading. Please, Share this article with others. It will inspire me to write more about this.

“Wear a mask to save lives. Clean your hands. Keep at a safe distance.”