ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00735.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryInaugural speech.Industrial statistics had their origin in Germany, where in the 1920s Daeves published a large number of papers on this subject.A short time afterwards statistical work in the field of electrical engineering was started in America. It resulted in numerous articles in the Bell System Technical Journal, and in 1931 culminated in the publication of Shewhart's classical work.An early publication in the Netherlands is the report submitted by van Ettinger during the “Efficiency days” in 1930, while in 1954 Schaafsma and Willemze published the first Netherlands standard work on quality cont

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00736.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryTowards efficient experiments.Under industrial conditions, where we encounter large random fluctuations, large numbers of observations, and a multiplicity of influencing factors, a proper analysis of the data on a statistical basis has become an essential part of our experimental techniques, which ultimately leads to more efficient methods of experimentation. This is illustrated by7practical examples.The first4examples deal with simple experiments for comparing two batches of raw materials when disturbing factors such as a time trend must be eliminated. The last3examples discuss more complex cases, namely a three‐factor experiment in the foundry, a latin square experiment in nylon spinning, and a five‐factor experiment of a mixed kind on gear‐noise testing.An attempt is made to explain in a simple form the relation between the statistical analysis of and the technical conclusions to be drawn from the result of a properly designed exper

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00737.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryIn most cases the buyer of durable consumers' goods cannot judge of the essential consumption characteristics, and is consequently guided by the finish.The manufacturer should bear this in mind, and should pay much attention to the outward appearance of these articles.Quality control is difficult to realise here, since in most cases the relevant properties cannot be measured because of their most subjective character.By means of a case study (bath‐tubs) the author illustrates the measures which had to be taken to effectuate quality control, and he mentions the results and successes yielde

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00738.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryOwing to the variability of the raw material and the large number of production units in textile industry the application of statistical methods is indispensable to obtain a high quality product.The author discusses examples of the statistical problems cropping up in various phases of the production process.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00739.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryAdress of the Director of the Foundation Industrial Quality Service.The increasing of productivity also has an important qualitative aspect, To promote the qualitative increase of productivity the “Kwaliteitsdienst voor de Industrie” (Industrial Quality Service) wants to organize courses through which the statistical quality control methods can for each separate branch of industry be made available to those who are able to apply these methods, but who cannot spare the time and the energy required to take fully note of the mathematical and statistical backgrou

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00740.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryThe normal or jigsaw‐puzzle method of planning cannot be applied to the production of an engine factory. One has to fall back upon a kind of statistical automatism, like in the planning of road traffic as opposed to the planning of railway traffic.In order to do this kind of planning efficiently, it is necessary to know the statistical relationships between the degree of occupation (number of working hours divided by number of available hours) of the machines, the waiting time and the velocity of flow through the factory.The statistical analysis of some of these quantities in an Amsterdam plant, manufacturing medium size diesel engines, showed that Erlang's formulas of waiting time in telephone traffic (with exponential distribution of holding times) are applicable.These formulas are used to prove that the highest degree of occupation is not the best one from an economic point of view. Formulas and graphs are given for finding the optimum degree of occupation in engine factories and other works where the same conditions appl

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00741.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryApplication of the ratio‐delay method.The ratio‐delay method affords a much quicker insight in the relation between direct‐productive and indirect‐productive times of a group of machines than the classical time study method.Especially with cyclical and a‐cyclical work the ratio‐delay method is the most efficient and sometimes the only means to obtain a justified rate at short notice. This also holds for serial piece‐production.Much attention will have to be paid to improving and accelerating ratio

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00742.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SummaryA manager's view on the application of statistics in the concern.To be able to judge of the correct dosing of statistical methods in his concern a manager should discriminate between incidental research and systemetical application of statistics. A sound job limitation and good information are indispensable to the success of a statistical check system.The cost of the introduction of statistical check methods into a concern with a variated manufacturing programme in the field of electrical engineering (350 people) was estimated to be Djls 18,000 in one year. In the next year more than this amount will be earned back through the savings and the improvements obtained.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1955.tb00743.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY