ISSN:0160-5682    

DOI:10.1057/jors.1971.75

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

摘要:

AbstractAll mining and milling complexes can, within limits, operate at a variety of production rates. Factors of economic importance that are affected by production rates are costs per unit production, recovery and product grade. Once the relationship between the production rate and cost is established, dynamic-programming techniques can define the optimum production schedule (i.e. the production schedule that maximizes the present worth of the operation) for the life of the deposit. In general, the optimum production rate is not constant for the life of the deposit, but declines gradually as the deposit is being exhausted.

ISSN:0160-5682    

DOI:10.1057/jors.1971.76

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

摘要:

AbstractThe learning curve or start-up model is extended to three examples of labour-intensive manufacture-automobile assembly, apparel manufacture and the production of large musical instruments. Prediction of the parameters of the model and the occurrence of steady-state "plateaux" are examined in relation to the findings. The results of the investigation suggest the wider applicability of the learning curve model in labour-intensive industries, provide additional data to evaluate an empirical approach to parameter prediction and demonstrate the difficulty of generalizing about the occurrence and predictability of steady-state plateaux. In addition, the application of different cost indices in learning curve research is demonstrated among new product start-ups in both single and multiple facilities.

ISSN:0160-5682    

DOI:10.1057/jors.1971.77

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

摘要:

AbstractA new approach to short-term forecasting is described, based on Bayesian principles. The performance of conventional systems is often upset by the occurrence of changes in trend and slope, or transients. In this approach events of this nature are modelled explicitly, and successive data points are used to calculate the posterior probabilities of such events at each instant of time.The system produces not only single-figure forecasts but distributions of trend and slope values which are relevant to subsequent decisions based on forecasts.

ISSN:0160-5682    

DOI:10.1057/jors.1971.78

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

摘要:

AbstractThis paper deals with the estimation of decision parameters in a special class of inventory systems in which the rate of stock depletion depends on the internal operations of the parent organization instead of market demands. Stocking decisions for this type of inventory systems are unique in that demands for the stocked items are internal demands, sporadic in some instances, infrequent in others, and almost never the direct results of conscious economic decisions. To cope with the peculiar situation, Bayesian point and interval estimation procedures are used. The estimated probability measures provide a basis on which stocking decisions pertinent to this type of inventory systems can be made or evaluated. Specific statistical postulates are made, and a numerical example is given for illustration. The possibility of applying the estimated results to one of the existing inventory models is briefly discussed at the end.

ISSN:0160-5682    

DOI:10.1057/jors.1971.79

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1971.80

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1971.81

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1971.82

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1971.84

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1971.85

出版商:Taylor&Francis    

年代:1971

数据来源: Taylor