摘要:

The design of control charts with respect to economic criteria has been a subject of considerable study. Several different process models have been developed and applied to individual control charts. This paper compares three types of control - X¯, Cumulative Sum, and Geometric Moving Average - using profit as the evaluation criterion. A simulation-based analysis is used to model the control chart functions, and the interrelationships between the type of control chart, sample size, sampling interval and magnitude of shift in the process mean are investigated.

ISSN:0020-7543    

DOI:10.1080/00207548908942535

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A concept using an optimization technique to design multi-edge BTA tools with cutters ‘taggered’ on the cutting head is developed. The cutting edges are located on the head so that they cut in a circular pattern over a portion of the hole radius, partly overlapping with each other. In many applications these tools should be superior to the conventional single-edge tools or multi-edge tools with cutters located at 180 degress to each other. When heavy cuts and large hole sizes are attempted with single-edge tools a large resultant force transmitted to the bore wall through the guiding pads causes undue rubbing and wear of the pads. This is followed by heat generation and increased power consumption and deterioration of the cutting edges. The tools with a staggered or zigzag arrangement of the cutters are designed for a predetermined cutting force resultant necessary for the tool guidance, which is controlled by appropriate radial and angular location of the cutters on the cutting head. The cutters of these tools can be combined at will, taking standard carbide inserts or trepanning insets of various grades to satisfy the hardness and toughness requirements, which change according to the increase in cutting speed by radius. The concept also offers more flexibility with regard to space required for chipmouths and chipthroats, resulting in better mass balance as well as the higher rigidity and strength of cutting heads.

ISSN:0020-7543    

DOI:10.1080/00207548908942536

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The design of an assembly system for a particular product is a complex engineering effort involving many interrelated decisions. The wide range of alternative system configurations makes a detailed design of each alternative too expensive and time-consuming. In this work a methodology is developed which helps the decision maker by ranking possible alternatives according to ‘subjective’ cost/ benefit criteria.

ISSN:0020-7543    

DOI:10.1080/00207548908942537

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Operational and financial measures deserve comparable attention. They both reveal information needed for sound management, but the measurement of operating performance is often neglected, especially in the white-collar and service sectors. An operational control system can be constructed by identifying several performance criteria that represent an organizational unit's mission, establishing satisfactory and superior levels of performance for the criteria, and determining the relative weight of each criterion in accomplishing the mission. The ‘objectives matrix’ formats a process for developing performance objectives and indicators. It has been widely adopted for its visual, motivational and multi-dimensional properties. By measuring work-unit performance along several dimensions, a manager is better prepared to make short-term operating decisions that promote long-term organizational productivity.

ISSN:0020-7543    

DOI:10.1080/00207548908942538

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207548908942540

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207548908942541

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor