SAMPLING PLAN
SCOPE:This plan indicates the number of units of product from each lot which are to be inspected (Sample size or series of sample sizes) and
the associated criteria for determining the acceptability of the lot ( acceptance and rejection numbers) .
FIELD OF APPLICATION:This sampling plan is followed by Incoming Quality Assurance (IQA) for inspection & testing of incoming raw material.
Normal/ Tightened Inspection:
1) Follow Normal Inspection in case if supply is coming first time or regular supply without any defect.
2) Follow Tightened Inspection in case if two out of five or less consecutive lot have been non- acceptable in normal inspection.
Reduced Inspection/Inspection Waiver: Follow reduced sampling inspection or waiver inspection if material is regular supply & ten
successive lots of previous supply are passed without any defect (In case of waiver, no inspection is required and clear the lot based on past 10
supplies found ok)
RESPONSIBILITY:In charge (IQA) is responsible for maintaining and control of this procedure.
Following sampling plan shall be followed for Incoming Raw Material Inspection
ABBREVATION:FIP – Forward Integrated Product
MRI- Meter Reading Instrument
PCB –Printed circuit Board
Sampling plan (IQA-001)
Scope :
This plan indicates the number of units of product from each lot which are to be inspected (Sample size or series of sample sizes) and the associated criteria for
determining the acceptability of the lot (acceptance and rejection numbers) .
Guidelines for sample size (Normal and Tightened Inspection)
Electricals, Electronics, Switches Relays, MRI’s,
Consumables,
Metallic parts, Plastics parts, Decals,
Packing material & Manuals All sub
Assemblies Parts and All types of FIP boxes
Wires, Cables sleeves, PCB, PCB’s sub
assemblies
All Hardware & Similar
(II)
(III)
(I)
LOT SIZE
Visual
Electrical / Dimensional/ Functional
Visual
2 TO 8
9 TO 15
16 to 25
26 TO 50
2
2
3
5
2
2
2
3
2
3
5
8
Electrical / Dimensional/
Functional
2
2
2
3
Visual
3
5
8
13
Electrical / Dimensional/
Functional
2
2
2
3
51 TO 90
91 TO 150
151 TO 280
281 TO 500
501 TO 1200
1201 TO 3200
3201 TO 10000
10001 TO 35000
35001 TO 150000
150001 TO 500000
500001 AND OVER
5
8
13
20
32
50
80
125
200
315
500
3
3
5
5
5
8
8
8
13
13
13
13
20
32
50
80
125
200
315
500
800
1250
3
3
5
5
5
8
8
8
13
13
13
20
32
50
80
125
200
315
500
800
1250
2000
3
3
5
5
5
8
8
8
13
13
13
Sample Size for (Reduced Inspection)-
Electricals, Electronics, Wires, Cables, sleeves, PCB,
PCB’s sub assemblies, Switches Relays, MRI’s,
Consumables, All sub Assemblies Parts and All types
of FIP boxes
Metallic parts, Plastics parts, Decals,
Packing material & Manuals
(I)
All Hardware & Similar
( II )
LOT SIZE
Visual
Electrical / Dimensional/ Functional
Visual
2 TO 8
9 TO 15
16 to 25
26 TO 50
51 TO 90
91 TO 150
151 TO 280
281 TO 500
2
2
2
2
3
5
8
8
2
2
2
2
2
2
2
2
2
2
2
3
5
8
13
20
Electrical / Dimensional/
Functional
2
2
2
2
2
2
2
2
(III)
Visual
2
2
3
5
8
13
20
31
Electrical / Dimensional/
Functional
2
2
2
2
2
2
2
2
501 TO 1200
1201 TO 3200
3201 TO 10000
10001 TO 35000
35001 TO 150000
150001 TO 500000
500001 AND OVER
13
20
32
50
80
125
200
2
3
3
3
5
5
5
32
50
80
125
200
315
500
2
3
3
3
5
5
5
50
80
125
200
315
500
800
2
3
3
3
5
5
5
Note: (I)
Resistors , Capacitors , Diodes , Transistors , Soldering Materials , Wires & Cables , sleeves , gaskets, Fuse, PCB’s, all sub assembly, switched relays, all IC’s,
Fuses , CT’s IPA , FLUX,Electromechanical, Mechanical parts, All types of FIP boxes , electricals,electronics & adhesive.
(PCB’s will be initially sampled. If defects are within acceptable criteria the lot is accepted, else the lot is screened 100%)
(II)
Plastics part, Packing, TTB, Brass, copper, metallic parts, Decals, manuals and similar parts.
(III)
All Hardware & Similar.
Sample selection:1. Unit in numbers and packed in boxes, bags or reels / rolls.
Consider total no. of box as a lot size and randomly select the boxes as per sampling plan. Take out the total number of samples from these boxes (Randomly) for visual
and dimensional inspection.
2. Unit in Volume (Liters, Kg, and Grams) and packed in drums, cans, Polybag, tubes etc.
Consider total no. of packets as a lot quantity and select samples of packets as per sampling plan. Finally inspection has to be done on selected packets.
3. Unit in Length (Meter) and packed in reels/ rolls.
Consider total no. of role as a lot quantity and select no. of samples out of this total lot. Inspect the material from each role, which is drawn by random sampling.
Acceptance Table: - Normal Inspection as per AQL 0.4
No.of Samples
2
3
5
Acceptance
0
0
0
Rejection /
1
1
1
100 % Inspection
8
0
1
13
0
1
20
0
1
32
0
1
50
0
1
80
1
2
125
1
2
200
2
3
315
3
4
500
5
6
800
7
8
1250
10
11
Acceptance Table: - Tightened
No.of Samples
Acceptance
Rejection / 100 %
Inspection
Inspection as per AQL 0.4
2
3
5
8
0
0
0
0
1
1
1
1
Acceptance Table: - Reduced Inspection as per AQL 0.4
2
3
5
No. of Samples
Acceptance
0
0
0
Rejection / 100 %
1
1
1
Inspection
8
0
1
13
0
1
20
0
1
32
0
1
50
0
1
80
0
1
125
1
2
200
1
2
315
2
3
500
3
4
13
0
1
20
0
1
32
0
1
50
0
2
80
1
3
125
1
4
200
2
5
315
3
6
500
5
8
Dimension and Value Inspection Guidelines. : 1. Measure the critical dimensions and values as marked in drawing or stated in test procedure or as per defined in Inspection standard.
2. Record the data in IQA format QF/QA/IQA/003 where inspection is done at IQA end.
3. Part can also be accepted on supplier report where all critical parameter inspected and visual criteria inspection covered in supplier report.
Sampling inspections Rules As Per IS 2500 PART 1 :1992
1. Normal to Tightened : When two out of five or less consecutive lot have been non –acceptable in normal inspection
2. Tightened to Normal : When five consecutive lot have been considered acceptable in tightened inspection
3. Normal to Reduced : When 10 or more than accepted in normal inspection & No problem reported from production line
4. Reduced to Normal : When lot rejected in reduced inspection or production delayed and irregular due to material quality
800
5
6
1250
8
9
800
7
10