Statistical Process Control Essay - 1168 Words

Statistical process control (SPC) is the application of statistical methods to the monitoring and control of a process to ensure that it operates at its full potential to produce conforming product. Under SPC, a process behaves predictably to produce as much conforming product as possible with the least possible waste. While SPC has been applied most frequently to controlling manufacturing lines, it applies equally well to any process with a measurable output. Key tools in SPC are control charts, a focus on continuous improvement and designed experiments. Much of the power of SPC lies in the ability to examine a process and the sources of variation in that process using tools that give weight to objective analysis over subjective opinions†¦show more content†¦While Dr. Shewhart drew from pure mathematical statistical theories, he understood that data from physical processes seldom produces a normal distribution curve (a Gaussian distribution, also commonly referred to as a bell curve). He discovered that observed variation in manufacturing data did not always behave the same way as data in nature (for example, Brownian motion of particles). Dr. Shewhart concluded that while every process displays variation, some processes display controlled variation that is natural to the process (common causes of variation), while others display uncontrolled variation that is not present in the process causal system at all times (special causes of variation).[3] In 1989, the Software Engineering Institute introduced the notion that SPC can be usefully applied to non-manufacturing processes, such as software engineering processes, in the Capability Maturity Model (CMM). This idea exists today within the Level 4 and Level 5 practices of the Capability Maturity Model Integration (CMMI). This notion that SPC is a useful tool when applied to non-repetitive, knowledge-intensive processes such as engineering processes has encountered much skepticism, and remains controversial today. Importance StatisticalShow MoreRelatedIntroduction And History Of Statistical Process Control1700 Words   |  7 PagesIntroduction and History of Statistical Process Control Statistical Process Control (SPC) is a method of controlling the quality of a manufacturing process and is most often affiliated with control charts. However, SPC in reality is a group of tools and includes additional statistical and evaluation/measurement methods. Smith, Megahed, Jones†Farmer and Clark defined seven basic tools of SPC including; histograms, check sheets, Pareto charts, cause-and-effect diagrams, defect concentration diagramsRead MoreUtility of Quality Control Tools and Statistical Process Control to Improve the Productivity and Quality in an Industry2972 Words   |  12 PagesUTILITY OF QUALITY CONTROL TOOLS AND STATISTICAL PROCESS CONTROL TO IMPROVE THE PRODUCTIVITY AND QUALITY IN AN INDUSTRY RALLABANDI SRINIVASU 1 G. SATYANARAYANA REDDY 2 SRIKANTH REDDY RIKKULA 3 1. Professor Director in St. Mary’s Group of Institutions, Hyderabad, India. 2. Professor HOD-MBA in CMR College of Information Technology, Hyderabad, India 3. Associate Professor, MCA Dept. St.Mary’s College of Engg. Technology, HyderabadRead MoreManual vs. Automated Statistical Process Control: Food Industries998 Words   |  4 Pagesinconsistent results of statistical process control routinely faced by Quality Control Managers. Product weight readings were taken from the manufacturing floor, entered into an Excel spreadsheet and analyzed. The results produced no predictable under or over filling trend despite the fact that the same people used the same scales at the same time of day. The problem is simple and fundamental. Human error is an inevitable part of the process of collecting statistical data. This is consistentlyRead MoreStatistical Process Control Charts2420 Words   |  10 Pages1 Introduction A control chart was invented in the early of 1920’s by Walter A. Shewart in the Bell Telephone Laboratories. In 1928 he was introduced the first Statistical Process Control Charts in the Bell Laboratories to improve the quality of telephones manufactured, he was developed a simple graphical method for the growing range of statistical process control charts (Montgomery,2010). Quality of a product or services is defined as â€Å"its fitness for the use† for which it has been made. Many characteristicsRead MoreOps 571 Statistical Process Control927 Words   |  4 Pagespainting process by installing a new sprayer?† These questions are meant to investigate and apply different techniques that we can use to improve the quality of life. Quality control not only applies to manufacturing techniques, it can also be applied to everyday life. This discussion will focus on a specific method of quality control called statistical process control that will ensure my morning process is effective. One method of quality control can be pursued through process control proceduresRead MoreDescription Of Spc ( Statistical Process Control )2144 Words   |  9 PagesAbstract: SPC (statistical process control) is an important tool to solve the manufacturing problem and the most modernized effective scheme to obtain process durability and fostering the process pertinence decreasing the variability. In manufacturing system, products do not run up against the proper province of quality permanently with the customer desire. This impermanency appears due to various productions of variations like machines, operators, materials, etc. The main purpose of control chart is toRead MoreStatistical Process Control of Activities in Daily Routine1337 Words   |  5 PagesStatistical Process Control Of Activities In Daily Routine Table of Contents 1. Analysis of the Problem 2. Application of Statistical Process Control and Solving the Problem (a) Statistical Process Control: X-bar Charts (b) Weekly Morning Time Utilization Chart 3. Observations from the chart 4. Conclusion 5. Solution 6. Effect of Seasonal Factors 7. Seasonal Factors 8. Usefulness of Confidence Intervals 9. References 1. Analysis of the Problem This paper is on process controlRead MoreQuality And Quality Of Quality Control1172 Words   |  5 Pages Quality Control Quality control (QC) is a set of procedures to ensure that a manufactured product adheres to the requirements of the client or customer. Inspectors collect data which is analysed for defective units which must be repaired or rejected and poor service repeated at no charge until the customer is satisfied. Advantages: Quality Control encourages quality consciousness among the workers in the factory which is greatly helpful in achieving high level of quality in the manufacturedRead MoreSeattle Concrete Case1627 Words   |  7 Pagesof their process to ensure that the control limits and capabilities are within reason, and to ensure that the addition of a second shift isn’t causing issues to their process. To accomplish this, a data set was constructed. Ten bags were tested every hour during each of the two separate eight hour shifts. This continued for five days to give us 800 observations, 400 from each shift. The samples provided were analyzed for management using statistical process control methods, control charts forRead MoreMaclean Fogg Company Design Analysis963 Words   |  4 Pagesindustries such as automotive, heavy truck etc., Founded in 1925 by John Maclean Sr., who started his own business in locking fasteners, today Maclean-Fogg with various manufacturing facilities, quality assurance methodologies, innovative product and process development techniques and with an annual sale of over $1 billion grown into a global enterprise. It is mainly comprised of 2 businesses i.e., Maclean Power Systems (MPS) and Maclean-Fogg Component Solutions (MFCS). With quality as main priority and