ISSN:0020-7543    

DOI:10.1080/00207546508919973

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

A computer simulation of an assembly line enforcing pacing on manned sequential stations indicates that unpaced station operations are superior to paced. Using the variability and work-time distribution of operator performance on repetitive tasks, a number of studies were carried out which show that an assembly line cannot perform at maximum efficiency (in terms of operator idle time and units completed) unless queues are provided before each work station. Studies of various station speed configurations indicate that the generally preferred configuration is Fast-Medium-Slow (short-medium-long cycle time) and that there is little difference among various configurations when the inter-arrival time is larger than any of the operator mean cycle times.

ISSN:0020-7543    

DOI:10.1080/00207546508919974

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

In this second of two experiments conducted to investigate some possible causes of stress experienced by semi-automatic arc welders, the effect of the weight of the stylus and the length of the time which it was held were examined in relation to the tremor which resulted. A specially designed stylus was used to track along a straight line which was defined by two parallel pencil lines. Eight subjects performed this test and each tracked for various lengths of time with styli of two different weights. The results indicated a considerable increase in errors due to the weight and time, the weight appearing as probably the most significant factor. The relevance of these results is briefly discussed.

ISSN:0020-7543    

DOI:10.1080/00207546508919975

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

In assessing the time a human operator takes to perform a task (whether the object be to compare the tasks or operator performance) there are many factors which must be taken into consideration. For experimental purposes we assume relationships between these various factors, but how do our assumptions affect our results? For instance, can times be dealt with as if they were normally distributed? A further problem; when comparing two or more sets of limes do we take into account whether or not the data has the same variance?

ISSN:0020-7543    

DOI:10.1080/00207546508919976

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

In the exercise described in this paper, players assume the role of retailers of a perishable commodity which is subject to variable demand. Each player makes a decision about the re-order quantity at the beginning of a cycle and penalties are imposed for leftovers or runouts at the end of the cycle. The performance of players can be compared with the optimal rule of a theoretical model, in which the demand distribution is assumed to be stationary. Experiments were conducted to study whether players improved their performance with time, whether managers with industrial experience performed better than players with little or no experience, whether the theoretical model was helpful in improving performance and whether the pattern of decisions was affected by the generated demand data.

ISSN:0020-7543    

DOI:10.1080/00207546508919977

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

This paper develops a procedure for locating profit maximizing operating conditions when the input variables are subject to control by the experimenter and observations on physical output may be taken subject to experimental error at any combination of these inputs. This procedure uses the Box-Wilson technique, a well-known statistical search procedure, together with the price of the output and the cost of the inputs so as to search for maximum profit points rather than maximum output points.

ISSN:0020-7543    

DOI:10.1080/00207546508919978

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

This paper presents the determination of the greatest stiffness and least power consumption of capillary compensated hydrostatic slideways, prestressed and non-prestressed, respectively. Design equations for determining the optimum values of supply pressure, pocket pressure, length of free-periphery of slideways rim, thickness of land of slideways rim, viscosity, capillary-discharge coefficient and power consumption are determined, other variables held constant. The paper determines the operative conditions which correspond strictly or approximately to the conditions assumed in the equations. Diagrams show the effect of discrepancy between optimum and actual conditions on the stiffness of slideways.

ISSN:0020-7543    

DOI:10.1080/00207546508919979

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

A hammer having a face in the shape of a thin rectangle is assumed to produce a plane-strain indentation. By applying rings of blows to a thin disc with the hammer face oriented circum-ferentially or radially, various axi-symmetric distributions of internal stress may be set up. Theoretical stresses were used for calculating changes in stiffness in various harmonic modes of flexure. Hence, effects of distributions of the two types of blow were assessed. The theoretical results, confirmed by controlled experiments, serve to elucidate some aspects of workshop practice.

ISSN:0020-7543    

DOI:10.1080/00207546508919980

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Calculations are made of the strains and final dimensions of an initially flat blank formed by a rubber punch over a rigid die having two principal radii of curvature. Both stretch and shrink flanging are considered.

ISSN:0020-7543    

DOI:10.1080/00207546508919981

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor