After reading this article you will learn about the classification of materials used for handling of materials: 1. Lifting and Lowering Devices 2. Transporting Devices. 3. Combination Devices. 1. Lifting and Lowering Devices: In this, all those handling devices are dealt which has only vertical motion. (a) Block and Tackle: Fig. 35.1 shows a Block and Tackle arrangement of lifting [...]
After reading this article you will learn about:- 1. Introduction to O.C. Curves 2. O.C. Curves for Single Sampling Plan 3. O.C. Curves for Double Sampling Plan 4. Zones. Introduction to O.C. Curves: O.C. curves quantifies manufacturer's (producer's) risk and consumer's (purchaser's) risk. This is a graph of the percentage defective in a lot versus the probability that the sampling [...]
After reading this article you will learn about frequency distribution and its use in controlling product quality. It is found that if production is carried on with proper care and accuracy then generally the resultant lot will be distributed in a so called normal pattern such as shown in plot 61.3. In this each product is arranged according to its [...]