| Calculation of SAM/SMV: | |||
Step 1: Select one operation for which you want to calculate SAM.
Step 2: Capture cycle time for that operation by stop watch standing beside of the operator. (cycle time: total time taken to do all works needed to complete one operation). Do time study for consecutive five cycles. Calculate average of the 5 cycles. Time we get from time study is called cycle time.
Basic Time = Cycle Time X Performance rating
* Performance rating: Performance rating means at what performance level operator doing the job, considering his movement and work speed. Suppose that operator performance rating is 80%. Suppose cycle time is 0.60 minutes. Basic time = (0.60 X 80%) = 0.48 minutes
Step 3: Standard allowed minutes (SAM) = (Basic minute + Bundle allowances + machine and personal allowances). Add bundle allowances (10%) and machine and personal allowances (20%) to basic time. Now we get Standard Minute value (SMV) or SAM. SAM= (0.48+0.048+0.096) = 0.624 minutes.
| 
OPERATION
  BREAKDOWN AND SMV | |||
| 
Name
  of Operation | 
M/C
  name | 
SMV  | 
Manpower | 
| 
Placket Iron | 
IRON | 
0.40 | 
2 | 
| 
Placket Join Position Mark | 
TABLE | 
0.30 | 
1 | 
| 
Placket Join | 
1N2TLS | 
0.32 | 
2 | 
| 
Placket Front Middle Cut | 
TABLE | 
0.28 | 
1 | 
| 
Rib Placket Servicing | 
O/L | 
0.25 | 
1 | 
| 
Lower Placket 2 Part Join | 
1N2TLS | 
0.30 | 
1 | 
| 
Lower Placket O/L  | 
2N4TOL | 
0.28 | 
1 | 
| 
Lower Placket Join & Top Stitch | 
1N2TLS | 
0.32 | 
2 | 
| 
Nose Tack | 
1N2TLS | 
0.35 | 
1 | 
| 
Back & Front Part Matching | 
TABLE | 
0.30 | 
1 | 
| 
Shoulder Joint & Trim | 
2N4TOL | 
0.33 | 
1 | 
| 
Collar Servicing & Mark | 
O/L | 
0.30 | 
1 | 
| 
Collar Tack to Neck | 
1N2TLS | 
0.40 | 
2 | 
| 
Collar Join | 
2N4TOL | 
0.32 | 
1 | 
| 
Collar Piping | 
1N2TFL | 
0.30 | 
1 | 
| 
Collar Top Stitch | 
1N2TLS | 
0.60 | 
2 | 
| 
Placket Close & 1/16 T/S | 
1N2TLS | 
0.71 | 
3 | 
| 
Placket Inner Tack | 
1N2TLS | 
0.35 | 
1 | 
| 
Placket Corner Cut | 
TABLE | 
0.25 | 
1 | 
| 
Placket Box Make | 
1N2TLS | 
0.50 | 
2 | 
| 
Cuff Servicing | 
O/L | 
0.25 | 
1 | 
| 
Cuff Join | 
2N4TOL | 
0.40 | 
1 | 
| 
Sleeve Matching | 
TABLE | 
0.30 | 
1 | 
| 
Sleeve Join | 
2N4TOL | 
0.43 | 
2 | 
| 
Arm Hole Top Stitch | 
2N3TFL | 
0.45 | 
1 | 
| 
Cuff Opening Tack | 
1N2TLS | 
0.30 | 
1 | 
| 
Sticker Remove+ Body Turn | 
TABLE | 
0.20 | 
1 | 
| 
Side Seam | 
2N4TOL | 
0.50 | 
2 | 
| 
Cuff Top Tack | 
1N2TLS | 
0.22 | 
1 | 
| 
Bottom Hem | 
2N3TFL | 
0.24 | 
1 | 
| 
Button Hole | 
1N2TBH | 
0.25 | 
1 | 
| 
Button attach With Mark | 
1N2TBA | 
0.40 | 
1 | 
| 
Label  Make & Bottom Security Tack | 
1N2TLS | 
0.43 | 
2 | 
| 
Total | 
11.53 | 
44 | |
Sewing Thread Consumption:
Sewing thread requirement 3.44 M for machine code 1N2TLS means to Stitch 1 Meter of Seam, 3.44 meter sewing thread is used.Here we need to consider operational allowance 3+3=6 cm (starting point+ ending point) for each operation for Lock Stitch and 3.5+3.5= 7 cm for chain stitch , 5+5=10 cm for Flat lock , 6+6=12 cm for over lock with the length of each operation.
Also we need to consider 10-15% wastage on the calculated sewing thread consumption.
| 
SEWING THREAD CONSUMPTION | ||
| 
M/C Name | 
CODE | 
Required Thread(M/M) | 
| 
Single Needle Lock Stitch | 
1N2TLS | 
3.44 | 
| 
Single Needle 2 Thread Flat Lock | 
1N2TFL | 
4.8 | 
| 
Double Needle 3 Thread Flat Lock | 
2N3TFL | 
13.2 | 
| 
Double Needle 4 Thread Over lock | 
2N4TOL | 
19.8 | 
| 
Without Needle Over lock M/C | 
O/L | 
0 | 
| 
Button Attach | 
1N2TBA | 
0.3 | 
| 
Button Hole | 
1N2TBH | 
0.95 | 
 

