statistical process control injection moulding

Tài liệu A Hybrid Neural Fuzzy System for Statistical Process Control docx

... Hybrid Neural FuzzySystem for Statistical Process Control 18.1 Statistical Process Control 18.2 Neural Network Control Charts 18.3 A Hybrid Neural Fuzzy Control Chart 18.4 Design, Operations, ... cause threeis present; process isout-of -control Assignable cause twois present; process isout-of -control Assignable cause oneis present; process isout-of -control Only chance causes ... are provided to assist those who seek an automatic SPC strategy. 18.1 Statistical Process Control Statistical process control (SPC) is one of the most often applied quality improvement tools...

Statistical Process Control Vol5 ppt

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... Designing the statistical process control system 334Objectives 33413.1 SPC and the management system 33413.2 Teamwork and process control/ improvement 33813.3 Improvements in the process 34013.4 ... LONDON NEW YORK PARISSAN DIEGO SAN FRANCISCO SINGAPORE SYDNEY TOKYO Statistical Process Control Quality, processes and control 5The problems are often a symptom of the real, underlying cause ... define the process. For example, if the process is making a sales call, it isvital to know if the scope of the process includes obtaining access to the 16 Quality, processes and control satisfy...

Statistical Process Control pptx

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... Quality, processes and control Objectives᭹ To introduce the subject of statistical process control (SPC) byconsidering the basic concepts.᭹ To define terms such as quality, process and control. ᭹ ... sinceI wrote the first edition of Statistical Process Control – a practical guide in themid-eighties. Then people were rediscovering statistical methods of ‘quality control and the book responded ... communications improve. Statistical process control (SPC) methods, backed by managementcommitment and good organization, provide objective means of controllingquality in any transformation process, whether...

Statistical Process Control For Susan, Jane and Robert.Statistical ppt

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... sinceI wrote the first edition of Statistical Process Control – a practical guide in themid-eighties. Then people were rediscovering statistical methods of ‘quality control and the book responded ... Understanding the process 23Objectives 232.1 Improving customer satisfaction through process management 232.2 Information about the process 262.3 Process mapping and flowcharting 292.4 Process analysis ... flowcharting 292.4 Process analysis 352.5 Statistical process control and process understanding 37Chapter highlights 40References 41Discussion questions 413 Process data collection and presentation...

Statistical Process Control For Susan, Jane and Robert potx

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... Inputs toFigure 1.1 A process 34 Understanding the process Figure 2.8 ‘Classic’ flowchart for part of a contact lens conversion process Quality, processes and control 7processes include: equipment, ... Understanding the process 23Objectives 232.1 Improving customer satisfaction through process management 232.2 Information about the process 262.3 Process mapping and flowcharting 292.4 Process analysis ... flowcharting 292.4 Process analysis 352.5 Statistical process control and process understanding 37Chapter highlights 40References 41Discussion questions 413 Process data collection and presentation...

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Statistical Process Control 5 Part 2 pptx

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... the inputs andoutputs of the processes, and in terms of the customers of and suppliers.2.5 Statistical process control and process understanding Statistical process control (SPC) has played a ... Acquisition of raw materials process map Understanding the process 31 process, including some of the important outputs and some of the problemsthat could occur at each stage. The process map or block ... andcritical processes.᭹ Creation of ‘dynamic models’ through mapping out the critical processeswill engage the people in an enduring change process. ᭹ A systematic approach to process understanding...

Statistical Process Control 5 Part 3 ppt

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... commoncauses of variation are present, the process is said to be stable or ‘in statistical control . Special causes lead to an unstable or ‘out of statistical control process. ᭹ Following an understanding ... operation,where the process is carried out, and by the operators of that process. Resultsare plotted on a chart which reflects the variation in the process. As shown inFigure 4.3 the control chart ... its management 79The purpose of a control chart is to detect change in the performance of a process. A control chart illustrates the dynamic performance of the process, whereas a histogram gives...

Statistical Process Control 5 Part 4 pptx

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... mean of the process and take suitable corrective action.Is the process in control? The operation of control charts for sample mean and range to detect the state of control of a process proceeds ... state of statistical control (Figure 6.9). A comparison of process capability andtolerance can only take place, with confidence, when it has been establishedthat the process is in control statistically.Capability ... processes are not in control when firstexamined using control chart methods and the special causes of the out of control periods must be found and corrected.Figure 6.9 Process capability Process...

Statistical Process Control 5 Part 5 ppt

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... together to control the process. ᭹ A set of detailed rules is required to assess the stability of a process andto establish the state of statistical control. The capability of the process canbe ... whether a process is in a state of statistical control. Several control chart techniques exist whichmake use of other measures.Use of control chartsAs we have seen in earlier chapters, control ... whether the process will generate products or serviceswhich match the specified requirements.3 Process Control Using Charts (Do we continue to be in control? ). The X and Rcharts carry ‘control...

Statistical Process Control 5 Part 6 pot

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... use of control charts for range and standard deviation,explaining their differences and merits.(b) Using process capability studies, processes may be classified as beingin statistical control ... 0.1424 0.26 Other types of control charts for variables 181them may be used to control the dispersion of the process, together with themean chart to control process average.If the standard ... 11.6 9.5 Other types of control charts for variables 185as continuous processes – only the time scales differ. Control charts areused to investigate the variability of processes, help find the...

Statistical Process Control 5 Part 7 ppt

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... process shows the process to be backin control. It continues to remain in that state for at least the next 14samples.Figure 8.5 c-chart – polythene fisheyes – process in control Process control ... 2ͱස4=8. 220 Process control by attributes᭹ The concepts of processes being in and out of statistical control applies toattributes. Attribute charts are not so sensitive as variable control chartsfor ... consecutive, the process is considered to be in statistical control. We may, therefore, reasonably assume that the process is producing aconstant level of 2 per cent defective (that is the process capability’)...

Statistical Process Control 5 Part 8 pdf

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... over the long term.When a process is under statistical control (i.e. only random or commoncauses of variation are present), a process capability index may be calculated. Process capability indices ... specification isinevitable.10.2 Process capability indicesA process capability index is a measure relating the actual performance of a process to its specified performance, where processes are considered ... the truth. In the case of the process capability this is true because:᭹ there is always some variation due to sampling;᭹ no process is ever fully in statistical control; ᭹ no output exactly...

Statistical Process Control 5 Part 9 potx

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... Understanding Statistical Process Control, 2nd Edn,SPC Press, Knoxville TN, USA.Discussion questions1 (a) Using process capability studies, processes may be classified as beingin statistical control ... pharmaceutical company carried out a process capability studyon the weight of tablets produced and showed that the process was in statistical control with a process mean (X ) of 2504 mg and a ... Figure 10.6 Mean and range control charts – tablet weights Process problem solving and improvement 279Figure 11.1 Strategy for continuous process improvement 278 Process problem solving and...

Statistical Process Control 5 Part 10 ppsx

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... F.109 66 H.C.L. control 27 Reactor stick 67 H.C.L. control 28 Reactor stick 68 H.C.L. control 29 Instrument/analyser 69 H.C.L. control 30 H.C.L. control 70 H.C.L. control 31 H.C.L. control 71 Reactor ... Reactor stick9 H.C.L. control 49 Reactor stick10 H.C.L. control 50 H.C.L. control 11 Reactor stick 51 H.C.L. control 12 Reactor stick 52 H.C.L. control 13 Feed poison 53 H.C.L. control 14 Feed poison ... 1.2Electric control unit 652 51.9Switching mechanism 4 120 10.2 Managing out-of -control processes 323Figure 12.3 Frequent, irregular shift in process mean 324 Managing out-of -control processessituation...

Statistical Process Control 5 Part 11 pps

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... eliminating problems and aiding process control. 13.3 Improvements in the process To improve a process, it is important first to recognize whether the process control is limited by the common ... Projects’. These revolve around the three major strategiesfor processes we have met in this book: Process design/redesign Process management Process improvementto bring about rapid bottom-line achievements.Table ... customerrequirements and the process that delivers these requirements – inputs,outputs, controls and resources.M Measure the current process performance – input, output and process – andcalculate...