What is the interpretation I-MR-R chart in this question?

  • Thread starter nicolasanelka39
  • Start date
N

nicolasanelka39

#1
The engineers in the Quality Control Department of the firm started to collect data for the
amount (g) of these hazardous contaminants in 400 g of chocolate hazelnut spread (weight
of a jar) on a daily basis for 20 days. At two different times (10 a.m. and 3 p.m.) of a day, one
jar is sampled from each of the two tanks. The collected data are shown in Table 1.
Table 1. Amount (in grams) of hazardous contaminant in inspected jars
10 a.m. 3 p.m.
AM - PM
Day Tank1 Tank2 Tank1 Tank 2
1 154,74 160,50 136,65 153,71
2 150,62 162,45 150,33 165,17
3 139,81 174,78 150,33 173,47
4 140,42 166,85 151,52 155,22
5 149,43 166,53 154,56 174,00
6 154,13 172,55 144,61 163,42
7 157,10 166,28 162,57 161,00
8 144,41 163,12 149,19 162,97
9 150,32 172,07 160,64 163,01
10 150,74 171,92 144,71 172,25
11 150,07 175,84 155,36 168,03
12 143,21 158,38 136,71 180,65
13 151,46 179,95 162,12 172,18
14 146,52 169,67 143,83 181,34
15 148,77 168,75 150,18 163,18
16 141,14 169,32 130,46 160,19
17 150,22 175,02 162,92 169,01
18 156,75 177,77 144,62 160,55
19 149,75 160,83 151,60 174,00
20 141,46 167,88 143,36 168,48
The engineers have decided to construct X̅-R chart to estimate the current mean and
standard deviation of the oil amount in jars, and to monitor the production process.
1. Comment on the appropriateness of use of ̅-R chart by analyzing the data.
2. Construct the chart and state what you observe on the chart in terms of being under
control for the process.
3. Identify the possible sources of variation in this production process and accordingly,
discuss the assumption(s) of the engineers in using the ̅-R chart.
After constructing and observing the control chart, these employees have observed that
the average hazardous contaminant amount is reasonable for their products. However, they
have realized that they failed to notice some source of variability in their process. The
engineers cannot agree on how the on-hand data should be used for monitoring their
production process.
March 22, 2017
3
4. Help them to find the most appropriate way to monitor their data.
5. Construct the chart you proposed. If the chart is out-of-control, make necessary
adjustments in order to estimate the mean and standard deviation of the hazardous
contaminant amount.
6. Estimate the mean and calculate the standard deviation (between/within) of amount
of hazardous contaminant.
After selecting and constructing the most appropriate control charting approach, they
have concluded that the control chart limit estimates are reasonable, so they can start
monitoring the process, and data for the coming week in Table 2 are obtained from the
process.
7. As a consultant, suppose that you were asked to check whether there exists any outof-control
signal. If it exists, comment on the possible special causes in the process
according to the data in Table 2.
Table 2. Amount (g) of hazardous contaminant for the next week
10 a.m. 3 p.m.
Day Tank 1 Tank 2 Tank1 Tank 2
21 155,52 168,98 140,73 174,54
22 141,70 171,27 150,75 170,40
23 145,18 172,40 150,71 173,46
24 146,75 175,03 166,23 156,10
25 156,62 179,20 151,53 164,26
 
Elsmar Forum Sponsor
Thread starter Similar threads Forum Replies Date
P I-MR Chart Interpretation - Minitab Chart Output Statistical Analysis Tools, Techniques and SPC 5
R X Bar R chart - Interpretation in MSA study Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
Jim Wynne Informational Control Chart Interpretation - General "Rules" Statistical Analysis Tools, Techniques and SPC 92
D Optical flats - "FLATNESS INTERPRETATION CHART, Light Wave Band Pattern Guide" General Measurement Device and Calibration Topics 4
R MDR, Annex I, 23.1 Interpretation - IFU on the website EU Medical Device Regulations 0
M MDR Article 22 Interpretation EU Medical Device Regulations 3
I Interpretation of the MDR GSPR 23.4 (u) EU Medical Device Regulations 2
D IATF16949 - Interpretation of Customer Requirements clauses Elsmar Cove Forum Suggestions, Complaints, Problems and Bug Reports 2
A Interpretation of GMP Requirements for class 1 medical device manufacturer (device GMP exempt, only General controls applicable) 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 4
P MDR Rule 10 interpretation - Active Device EU Medical Device Regulations 3
Q % Study variation low, % tolerance high - GR&R Interpretation help Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
A Interpretation with regards to Ppk > Cpk Capability, Accuracy and Stability - Processes, Machines, etc. 14
A OHSAS 18001 external auditor finding personal interpretation? Occupational Health & Safety Management Standards 5
A OEM branding - My interpretation of the LVD Directive makes us a manufacturer CE Marking (Conformité Européene) / CB Scheme 3
P Average Peel Strength - Interpretation of BS EN 868-5:2018 and ASTM F0088/F0088M Other Medical Device Related Standards 2
B ISO 50001 Interpretation of section 3.3.9 (Outsourcing) ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
K Interpretation of significant change - material change Canada Medical Device Regulations 3
R MDR Software Rule 11 Formal Interpretation EU Medical Device Regulations 7
A IATF Sanctioned Interpretation No. 7 - Type and Extent of Control (supplemental) IATF 16949 - Automotive Quality Systems Standard 4
F Interpretation of MDR 2017/745 Article 23 - CE Mark Requirements EU Medical Device Regulations 8
U Hand-Held dosing device has no PATIENT - Interpretation of the PATIENT definition IEC 60601 - Medical Electrical Equipment Safety Standards Series 6
G Medical Device "Immediate Container" Interpretation of Definition US Food and Drug Administration (FDA) 2
A Interpretation of Article 16 (2b) - Packaging, samples and Certificate EU Medical Device Regulations 10
D EU MDR Corrigendum Interpretation EU Medical Device Regulations 3
M Informational MDCG 2019-3 Interpretation of Article 54(2)b – Pre- market clinical evaluation consultation procedure with the involvement of expert panels Medical Device and FDA Regulations and Standards News 0
G EU MDR 2017/745 Rule 11 interpretation - Re-classification of a Software as Medical Device Other Medical Device Related Standards 0
JoshuaFroud Interpretation of Clause 5.5.2 in ISO 13485:2016 ISO 13485:2016 - Medical Device Quality Management Systems 2
qualprod P x I = Value interpretation for residual risk? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
T CSA Z299.3-85 Nuclear interpretation AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
D VDA Trigger Matrix in the VDA 6.2 Manual - Interpretation and Use VDA Standards - Germany's Automotive Standards 3
B Interpretation of Customer Specific Requirements of Continental - Records Retention Customer and Company Specific Requirements 6
S Interpretation or Definition of ‘Once Every 5 Days’ ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 7
E ME (Medical Equipment) Systems - IEC 60601-1 Clause 16.1 Interpretation IEC 60601 - Medical Electrical Equipment Safety Standards Series 6
P IATF 16949 Cl. 7.1.5.2.1 "Calibration/Verification Records" Interpretation IATF 16949 - Automotive Quality Systems Standard 12
B Clarification on interpretation of some EN ISO 14971:2012 & IEC 62304:2006 req's ISO 14971 - Medical Device Risk Management 46
M IATF 16949 - 7.1.3.1 Plant, Facility, and Equipment Planning - Interpretation IATF 16949 - Automotive Quality Systems Standard 8
R Location Interpretation on Drawing - Hole to Hole? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
T TS 16949 Clause 7.4.1.2 and Sanctioned Interpretation IATF 16949 - Automotive Quality Systems Standard 12
D Interpretation of new IAQG ruling - Audit duration for nonconformance verification AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 7
K Interpretation of IEC 60601-1-2 Electromagnetic Compatibility – Requirements & tests IEC 60601 - Medical Electrical Equipment Safety Standards Series 4
S Heat Treatment - Soaking time interpretation Manufacturing and Related Processes 5
D Interpretation of DOE interaction plot Using Minitab Software 8
A Training material for interpretation & understanding Part 11 requirements 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 2
L Interpretation of "Any or All"'? IEC 60601 - Medical Electrical Equipment Safety Standards Series 10
G Interpretation of phrase - "Direct Authority" EASA and JAA Aviation Standards and Requirements 5
pittmatj Brazil: Interpretation of RDC 185 Other Medical Device Regulations World-Wide 6
D What is your understanding or interpretation of TS16949 7.4.1.2 IATF 16949 - Automotive Quality Systems Standard 6
M Interpretation of Plus/Minus Draft - Injection Molded Parts Inspection, Prints (Drawings), Testing, Sampling and Related Topics 10
E FDA Significant Change Interpretation - Guidance Document EU Medical Device Regulations 2
0 ISO 9001:2008 interpretation not the same per country? (Netherlands and France) ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 7

Similar threads

Top Bottom