Statistical Process Control Essay Example | Topics and Well Written Essays - 2500 words

Statistical Process Control - Essay Example There are many factors that affect the scenario like mental focus, body strength, direction of air, kick intensity, shoe structure and level of tiredness etc. Despite these factors the players are selected in teams for their marksmanship. The question that arises here is that if a player cannot exhibit exactly same performance again and again then what the criterion of a player selection is? The answer to this question is very simple. Players are selected on the basis of level of control and their consistency to exhibit that ranged control over and over again. For example if a bull’s eye miss rate of a shooter remains in certain acceptable limits then he would be considered in control of his expertise. Evans J. R. (1991) in his book, indicates that a production process generally comprise of the entities namely People, Materials, Machines, Measurements and Methods. It is observed that these factors are the main causes of variations in a production process. The causes of variati ons are observed to be of two types. Common causes: That can be reduced by introducing changes in the process but cannot be eliminated completely. For example using a better version of sail may improve the output of yachting endeavor. Special causes: however are easy to be figured out and eliminated. For example upon discovery of a malfunction a machine repair can re-align the process of production etc. As mentioned earlier that despite the absence of exact replication, the process are considered and relied upon due to the â€Å"Under Control Factor†, the inception of process control seems essential for almost all processes. The Fundamental Concepts And Aims Of SPC: Regarding the assurance of product quality the conventional approach is to inspect the product after manufacturing in order to pass it or to reject it. This approach is found to be less economical and wasteful since a whole lot of manufactured product may be rejected due to a consistent production flaw. A better a pproach is to timely stop the flawed process of production in order to curb manufacturing of products that do not meet the required specifications. The process oriented approach that emphasizes on analysis of production data produced at runtime in order to control the quality of the product by keeping its construction between specifically determined limits is called Statistical Process Control. The term â€Å"Statistical† indicates the involvement, study and analysis of numeric data values that hold production information. The SPC comprises of, Selection of Observation Samples from process of production. Quality Characteristics Measurement. Data recording and calculations. Construction of Control Charts and other assisting graphs. Chart analysis for problem identification. Cause determination and rectification in case of a problem. The approach of SPC is aimed towards, Optimizing the cost – production ratio. Facilitating the production operators in identifying the prob lems that arise due to the usage of inappropriate materials, tools and equipments. Enabling the operators to determine the normal control limits and bearable ranges of variations in order to ease the process of frequent machine adjustments. Enabling the production managers to assess the capability extent of the production process to which it can produce a product within control limits. Supporting decision making regarding purchase of new equipment. Keeping

Report on two water provision methods Lab Example | Topics and Well Written Essays - 1250 words

On two water provision methods - Lab Report Example 21). This describes the situation of arid and semi-arid areas that constitute 30% of the land surface in the world. This means the areas may experience periods of sporadic water shortages, which may threaten the development of the community as well as the lives of the population. The situation is addressed through the establishment of water demand and supply balance that is multifaceted through the incorporation of water provision projects in the regional planning needs. The projects so incorporated should be tailor made to suit the specific problems of the region. Methods of water provision in arid areas The provision of water process may incorporate a diverse range of methods that seek to establish a stable and renewable water supply and demand chain for the arid regions. These options range from the construction of dams to create reservoirs, desalinization processes, ground water reserves exploration, reusing of wastewater, and enhancing rainwater collection methods. However, some factors in the regions serve to rule out some options as the preferred modes. The option of rainwater collection is ruled out if the area receives minimal annual rainfall amounts. The area also requires a steady source of water in the form of a river, for the construction of a dam (Cipollina, Micale, and Rizzuti, 2009, p. 45). The amount of water availed by reusing is dependable on the amount available for use in the first place. This leaves desalinisation processes and the exploration of ground water reserves as the most viable options. Background information of the two methods 1) Desalinisation processes Desalinization also referred to as desalination, is a term used for any of the processes used to remove the large quantities of salts and minerals contained in saline water. The aim of the processes is to produce fresh water that is suitable for incorporation in irrigation and human consumption. The processes are preferred as they produce salts as byproducts that are used in the production of other products. This method of water provision is applicable in the setting of arid areas as most have underground water reserves that are high in salt content that make them unfit for human consumption and other general-purpose applications like irrigation (Wang 2008, p. 24). The method is specifically suitable for arid areas like Egypt and Israel that are next to unlimited saline water reserves in the form of the sea. 2) Underground water exploration Ground water is the collection of water in the ground that results from the infiltration and percolation of water from various forms of precipitation ranging from rainfall to snow, which is then trapped in bedrock consisting impermeable rocks. The location of these water resources is not restricted to specific regions as it is found nearly everywhere (Raghunath2007, p. 71). However, the usable and reliable quantities are only found in rock formations known as aquifers with sufficient voids between them enabling the holdi ng and conducting of water. This means that most arid areas are sitting on large water reserves that may act as stable water supply sources in the areas if they are explored (Webb 2006, p. 12). Comparison between the two methods Processes used i) Desalinization Originally, the processes of desalinization applied vacuum distillation processes to separate the salts from the water. This involved the boiling the saline water in pressure conditions that are much