Titlebook: Standardization: Mathematical Methods in Assortment Determination; C. Bongers Book 1980 Springer Science+Business Media Dordrecht 1980 Mat

任意

Introduction,as a process capable of improving efficiency, communication and identification. Also, the importance of creating national and international standards began to be realized. Since then, countless product properties have been subject to standardization resulting in the situation that nowadays hardly an

鉆孔

我沒(méi)有命令

Several Ways to Select a Size Pattern,ce the method of choosing the sizes according to a geometrical series—while others are based on a clearly defined objective with an economical or social background. As already mentioned before, we have adopted the objective of the minimization of the expected adaptation loss; application of this obj

玷污

The Recursion Formulae for the Homogeneous Distribution,d sizes was not yet specified in these formulae. In the Chaps. 5, 6, 7 and 8 we shall substitute successively some well-known density functions into the recursion formulae. This has the effect that in most cases the recursion formulae and the formula of the expected adaptation loss can be reduced to

指派

The Recursion Formulae for the Log Normal Distribution,s somewhat less easy to handle than the normal distribution, the methods that are used to reduce the recursion formulae to a more simple form, so that they easily can be calculated, are similar to those of the previous chapter. In this sense, the chapter thus contains no extensions of the theory dev

踉蹌

The Standardization of the Power of Electro Motors,second, are given by the Nen 3321 standard. Because the motors with 25 r/s are used most often we have chosen this type of motor as an example to illustrate the process of devising an optimal size pattern. We will begin by calculating some optimal size patterns based on the purchase price of 25 r/s

言行自由

Size Patterns Which form an Arithmetical or Geometrical Series,ion the strong preference for series of this type is not justified. Apart from the fact that they have no theoretical background, the expected adaptation loss when using these series will usually be considerably larger than that of an optimal size pattern. We will show this by means of some examples

Ondines-curse

The Standardization of Two Properties of a Product,n of two or more properties is necessary. We may for instance think of the inner and outer diameters of pipes or the power and the number of revolutions of electro motors. In this and the following chapters attention will be paid to standardization problems where two properties are to be standardize

Calculus

The Line Restriction,note the ith size by (x., y.) (i = 1,..., n) then the line restriction orders.Taking for instance n equal to 3, a size pattern chosen according to the line restriction has the following form (see Fig. 15.1). The figure shows that the service areas, except S., all have a similar shape. As when using

典型

The Generalized Grid Restriction,use in some cases, it will be clear that in general the expected adaptation loss of size patterns computed by means of these models can be reduced by loosening or dropping the restriction the size pattern has to satisfy. Unrestricted selection of the sizes obviously leads to size patterns possessing