Can you help with a simple SPC sheet to judge if inspection is Good / No Good ?

S

starupdk

#1
can someone tell me or suggest the simplest SPC sheet a sheet that has a Lower and a higher chart and and mabye can tell the operator that it is good (green) og not Good(red)

please help

Thank
 
Elsmar Forum Sponsor
C

chiquinha

#2
Re: simplest SPC sheet

Hello,

i?m trying to start a spc for my process and i'd aprecciate if somebody could help me too!

:D

Thanks!
 

Steve Prevette

Deming Disciple
Staff member
Super Moderator
#3
I've helped out quite a few folks over the years with SPC. See materials at http://www.efcog.org/wg/esh_es/Statistical_Process_Control/

Of course I would need to know a little more about what you are trying to do. On the "red green" comment in the first post - consider that all SPC can tell you is if something is changing - and should be investigated. If SPC and the manufacturing process is working properly, you should be able to detect the change and correct for it prior to production of out of specification (red) produdnt.
 
C

chiquinha

#4
Hi Steve,

Thanks!! i'll check the materials you post and pray to understand them ;)

Can you tell me how do you define the initial data? How do you know how many pieces you should control? and what frequency?

i've tested 30 pieces and the variation i get is very small so the cpk is less than 1! I don't understand this because i don't want to have variation in pieces so the cpk should be higher right?
 

Steve Prevette

Deming Disciple
Staff member
Super Moderator
#5
Hi Steve,

Thanks!! i'll check the materials you post and pray to understand them ;)

Can you tell me how do you define the initial data? How do you know how many pieces you should control? and what frequency?

i've tested 30 pieces and the variation i get is very small so the cpk is less than 1! I don't understand this because i don't want to have variation in pieces so the cpk should be higher right?
CPK depends upon both the SPC results, and what the specifications are. You state your variation is very small. If that is true (in comparison to the specifications) then your cpk should be large . . .

If you will send me a private message with the 30 data values, tonight I'll demo how a X-MR chart could be made.
 
Thread starter Similar threads Forum Replies Date
Z Xbar/R control chart help (possibly a simple question) Using Minitab Software 1
J Need Help with FPY Data in Assembly Process Manufacturing and Related Processes 7
S Need help on "Country of Origin" Medical Device and FDA Regulations and Standards News 0
M Need Help With Information Security Asset Risk Register IEC 27001 - Information Security Management Systems (ISMS) 2
T Help with BS EN ISO - IEC 80079-34 2020 (Explosive atmospheres QMS) Other ISO and International Standards and European Regulations 0
J Help settle a disagreement: Should external providers of preventive maintenance be on your ASL? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 5
N Help with basic understanding of Competence requirements ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
C ISO/ IEC 17021 Resource requirement (need help) Document Control Systems, Procedures, Forms and Templates 5
D Supplier Quality level category help - high level ISO 13485:2016 - Medical Device Quality Management Systems 6
D Amendment Class II - Please confirm if the submission is by email (Canada) - Help Canada Medical Device Regulations 0
T ISO/IEC 17065 certification scheme Help Other ISO and International Standards and European Regulations 7
T Help to Suggest name for a new certification and inspection company Coffee Break and Water Cooler Discussions 7
SocalSurfer AS9100 new certificate, but need QMS software, help Quality Assurance and Compliance Software Tools and Solutions 2
L Manufacturing Process Audit Help IATF 16949 - Automotive Quality Systems Standard 6
M Case study help as per ISO 9001: 2015 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 18
M Case study solution help required as per ISO 9001 : 2015 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
A Beginners help with ISO3951-2 Combined control s-method n>5 what is Phi ?? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 0
MDD_QNA Medical Device Software - Is a Help Button required? IEC 62304 - Medical Device Software Life Cycle Processes 1
S Need help with analysing a survey on minitab Using Minitab Software 1
M Help me improve the definition for internal PPM Manufacturing and Related Processes 3
I Help: QFD House of Quality Quality Tools, Improvement and Analysis 1
C New to Site - Request Help with API Q2 Implementation Oil and Gas Industry Standards and Regulations 9
O Please, help with document on ISO/ TS 17758 and (IDF 87: 1979). Thank you. Manufacturing and Related Processes 1
A Class medical device (MDD) - Classification help EU Medical Device Regulations 1
K A proposal for the model Quality Management - I need help for the project ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
A Help with Drawing Review - ISO 9001:2015 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 6
Q % Study variation low, % tolerance high - GR&R Interpretation help Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
R Probability - Need a help to solve the below question Statistical Analysis Tools, Techniques and SPC 5
M Thanks for the help Coffee Break and Water Cooler Discussions 0
Judy Abbott Can any one help me with an urgent BIOCOMPATIBILITY Impact assessment? Internal Auditing 9
A Help establishing regulatory requirements - Plastic dental cartridge syringe US Food and Drug Administration (FDA) 0
A Medical Device Contract Manufacturing Requirements and Information - Help wanted ISO 13485:2016 - Medical Device Quality Management Systems 5
8 Need Help - Runout - Function Gage Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
T Burn out - Tips to help combat QC burnout Career and Occupation Discussions 9
Emran.mi Measurement system analysis - Can you help me about implementation MSA for CMM device Manufacturing and Related Processes 2
S New to FAIR, need help in filling it out AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 8
M Informational From RAPS: Danish Regulators Seek to Help Smaller Companies With EU MDR Compliance Medical Device and FDA Regulations and Standards News 0
M Reliability Testing - Weibull Analysis Help Reliability Analysis - Predictions, Testing and Standards 4
L Help me to decide which test to use - If each proportion belongs to the same population Using Minitab Software 7
M Informational US FDA issued the first warning letter for UDI violations to help ensure compliance Medical Device and FDA Regulations and Standards News 0
T QMS Template Help - Small machine shop/job shop Manufacturing and Related Processes 1
R Pls help --- Need expert advice on Video Measurement Measurement Uncertainty (MU) 0
B Will you please help me with my academic project? Repair & calibration service for test equipment ISO 17025 related Discussions 0
B [Help] Customer Engagement Survey for MBA Project - due Apr19 Manufacturing and Related Processes 0
B Help with Customer Engagement Survey for MBA Project - due Apr19 General Measurement Device and Calibration Topics 0
Q ISO 3310 Clarification Help - Aperture sizes for sieves used for particle sorting Other ISO and International Standards and European Regulations 2
Ajit Basrur Need help to understand HIPAA requirements ISO 13485:2016 - Medical Device Quality Management Systems 17
JoshuaFroud FDA Form MDSAP AU F0029.1.004 - Help with Completion US Food and Drug Administration (FDA) 0
supadrai Aviation MRO Project facility coming to U-Tapao airport in Thailand - Help Career and Occupation Discussions 2
E Small one man shop with QMS (shoptech e2) | AS9100 cert help AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 46

Similar threads

Top Bottom