Designing a Mil-Std-105 or ANSI/ASQ Z1.4 Sampling Plan

johnnybegood

Involved In Discussions
#1
We have a production with a run rate of 1k per shift. Production manually assemble the product and have it tested electrically at test station. Before the product is send for packing, Production will 100% visually inspect for mechanical/cosmetic defect. QA inspector will do sampling buy-off electrical and mechanical/cosmetic.
The product does not come to QA in a constant rate. My question is how do I generate a correct sampling plan? Customer goal is 0.08dphu
 
Elsmar Forum Sponsor
A

Al Dyer

#3
Yes,

105-E is very good and there is also a good one in Juran. The important aspect, in my opinion, is that these guidelines and tables can be modified from their original content to work with any company specific situation.

The thing is not where it is from, but if it works.

Great guidelines

Al...
 

howste

Thaumaturge
Super Moderator
#5
Originally posted by johnnybegood
How to set or determine the AQL and which inspection level?
From MIL-STD-105E page 2:

Use of a value of AQL for a certain defect or group of defects indicates that the sampling plan will accept the great majority of the lots or batches provided the process average level of percent defective (or defects per hundred units) in these lots or batches be no greater than the designated value of AQL.
So what you want to do is find the AQL closest to your customer's requested AQL (which is the same as DPHU) of 0.08. The options you have are 0.063 or 0.10. I'd probably play it safe and pick 0.063. You can look at the OC curves in the standard to see if it makes sense.

Normally inspection Level II is used. Other levels can be used depending on the sampling risk.
 

johnnybegood

Involved In Discussions
#6
Let say my customer does not spell out the dpku goal. Now how do I set a sampling plan then? I really do not know where and how to start.


howste said:
From MIL-STD-105E page 2:


So what you want to do is find the AQL closest to your customer's requested AQL (which is the same as DPHU) of 0.08. The options you have are 0.063 or 0.10. I'd probably play it safe and pick 0.063. You can look at the OC curves in the standard to see if it makes sense.

Normally inspection Level II is used. Other levels can be used depending on the sampling risk.
 
#7
Food for thought;
If production is already doing the testing and visual inspection, what is the need for an additional QA inspection?
 

johnnybegood

Involved In Discussions
#8
Sam said:
Food for thought;
If production is already doing the testing and visual inspection, what is the need for an additional QA inspection?

call it escapee.......Production may not be testing/visual inspection 100% eventhough they are suppose to do so. Visual inspection are manually human dependent thus defect may skip thru.
 
T

Teknow

#9
Sam said:
Food for thought;
If production is already doing the testing and visual inspection, what is the need for an additional QA inspection?
I agree with Sam, however certain customers (from a supposedly forward thinking organisation) still insist that we perform an indepent QA sample before releasing product!:bonk:
 
Thread starter Similar threads Forum Replies Date
S Earthing of moving parts, designing tips IEC 60601 - Medical Electrical Equipment Safety Standards Series 2
J Designing new gauge tracking software IATF 16949 - Automotive Quality Systems Standard 4
A Leadership Role in Designing QMS - Upper Management Support Quality Manager and Management Related Issues 16
S Designing the experiment with minimum run Statistical Analysis Tools, Techniques and SPC 0
S Designing the experiment with minimum run Statistical Analysis Tools, Techniques and SPC 0
B Designing a Sampling Plan - AQL AQL - Acceptable Quality Level 19
F Designing a Hollow Medical Device for Autoclavability Other Medical Device and Orthopedic Related Topics 2
Claes Gefvenberg Designing Supplier Questionnaire Forms Supplier Quality Assurance and other Supplier Issues 25
M Designing a Quality Assurance and Control System Quality Manager and Management Related Issues 3
P Sheet Metal Design: Standard method for designing Electrical Knockouts Design and Development of Products and Processes 7
N Designing an attribute MSA for a new piece of metrology equipment Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 11
R Line Balance Simulation when Designing a New Production Line Lean in Manufacturing and Service Industries 1
D Designing a Training Course called "Role of the Laboratory Quality Manager" Training - Internal, External, Online and Distance Learning 13
A Designing a Documents Control System from scratch (in a php intranet) Document Control Systems, Procedures, Forms and Templates 5
K Designing a gauge to check the Axis of Snorkel of Axles Design and Development of Products and Processes 5
A Designing a Closed Loop Water System using Adiabatic Cooling Towers Manufacturing and Related Processes 5
R AS9100C Clause 7.3 Design & Development - Designing a System and Procedures AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
S API Std 620 vs. API 650 standard? Which is the least restrictive in designing a tank? Manufacturing and Related Processes 1
A Designing an Ethylene Oxide Sterilization Process Other Medical Device Regulations World-Wide 7
M Designing a Nonconformance Management Process Nonconformance and Corrective Action 35
Q Are there any threads specifically concerned with designing with AutoCAD? Design and Development of Products and Processes 1
P Designing a "part-specific" Receiving Gauge - Gauge first or job? Design and Development of Products and Processes 4
C Designing Control Charts - Variable with Small Variation and Tight Control Limit Statistical Analysis Tools, Techniques and SPC 20
C Designing control chart for non-normal variables Statistical Analysis Tools, Techniques and SPC 3
A Is the Assembly of the Prototype after Designing considered a Production Process? Design and Development of Products and Processes 11
M Designing a scope for APQP Design and Development of Products and Processes 2
B Designing a Test Part to Assess CMM Operator's Knowledge Design and Development of Products and Processes 9
D Designing an ISO 9001 Internal Audit Training Course - Need Help Internal Auditing 6
S Project Management QMS - Manufacturing and Designing of Special Purposed Machines Design and Development of Products and Processes 5
L Categories for data collection - Designing a form for when errors occur Nonconformance and Corrective Action 6
R Designing and building our own machines Design and Development of Products and Processes 5
V Designing an integrated ISO 9000 - ISO 14000 System in a Big Marine Port Design and Development of Products and Processes 3
S US Success in Designing & Manufacturing World-Class Goods Design and Development of Products and Processes 2
Claes Gefvenberg Document control applications - Be very wary about designing your own Document Control Systems, Procedures, Forms and Templates 4
F 8.2.1 Customer Satisfaction - Designing & Building a Solid waste disposal facility ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 36
O Need documentation - Designing a data acquisition system for the enviromental chamber Design and Development of Products and Processes 3
Y Examples of TRB Reports for MIL-PRF-31032 Qualification AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 0
Marc MIL-STD-810H - 31 January 2019 Various Other Specifications, Standards, and related Requirements 0
R Electrical contact resistance testing in MIL-DTL-5541 AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 3
K MIL-STD-2000 Certification Requirements Manufacturing and Related Processes 9
G Mil-Std-130N, can calibration be a nationally traceable standard? Various Other Specifications, Standards, and related Requirements 0
R Salt spray per Mil-DTL-5541 coupons required 5 or 10 AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 3
E AMS-H-6875 compared to MIL-H-6875 AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 3
S MIL-HDBK-217 - Understanding the various Environmental Conditions Reliability Analysis - Predictions, Testing and Standards 1
M Help interpreting MIL-STD-105E Single Sampling Plans Tables Inspection, Prints (Drawings), Testing, Sampling and Related Topics 5
A MIL STD 105 D or ISO 2859-2? Receiving Metal Sheets Quality Tools, Improvement and Analysis 6
A Inspection Plans - How to choose AQL (MIL STD 105E) Excel .xls Spreadsheet Templates and Tools 1
D International Standards (ISO or MIL) for MTBV Reliability Analysis - Predictions, Testing and Standards 4
J Mil Std 810 G test 516 vs IEC 60068-2-27 - Classic Waveform Shock Various Other Specifications, Standards, and related Requirements 1
K Black Anodize Color Specification per MIL Spec Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1

Similar threads

Top Bottom