The work presented in this paper is addressed to the front-end phases of the development of a sys... more The work presented in this paper is addressed to the front-end phases of the development of a system supporting a complex decision-making task: high-level managerial planning in small-to-medium enterprises (SMEs). It attempts to identify characteristics of the competences possessed by experienced managers and used when taking high-level managerial planning decisions, and to assess their potential implications for system design. The
International Journal of Value Chain Management, Mar 20, 2015
During the last decade, electronic procurement has acquired a great number of supporters. Interne... more During the last decade, electronic procurement has acquired a great number of supporters. Internet-based procurement applications have significantly improved the overall supply chain operation. There is a lot of research regarding the effects of such applications on supply chain management. However, very little research exists regarding the organisational impact of such applications. In order to fill this gap, research was made within the framework of a European research project. More specifically, a questionnaire was designed and distributed to a number of industrial firms in six European countries. The results of the study suggest that respondents perceive a positive impact of e-procurement applications on issues such as employees' satisfaction, job formality, work and business relationships. The perceived impact on these issues varies among companies, depending on such variables as country, number of employees and sales turnover, and is not overshadowed by the e-tech sophistication of the subject companies.
• Warehouses are important links between the production sites and the customers • Need to shorten... more • Warehouses are important links between the production sites and the customers • Need to shorten the throughput times in the supply chain • Need for faster response to customer demand -Fluctuations in customer demand -Increase in the frequency of orders -Decrease in the size of orders -Increase in product proliferation • Trade-offs between warehouse costs and delivery performance "Warehouse management for improved order picking performance", Zakynthos 2005 2 Warehousing performance Warehousing performance
International Journal of Operations & Production Management, 2001
... Socrates J. Moschuris, University of Piraeus, Piraeus, Greece. ... personnel), formalisation ... more ... Socrates J. Moschuris, University of Piraeus, Piraeus, Greece. ... personnel), formalisation (ie extent to which purchasing tasks are defined by formal documents), centralisation (ie extent to which purchasing responsibilities are delegated among several lower managerial levels ...
Robotics and Computer-Integrated Manufacturing, 2001
In this paper the problem of build-time estimation for Stereolithography systems is examined. Exp... more In this paper the problem of build-time estimation for Stereolithography systems is examined. Experimental results from various case studies indicate that the accuracy of estimation greatly depends on the type of part geometry representation processed and the uncontrolled laser power #uctuations. It is shown that estimation based on sliced (CLI) representation can be extremely accurate, assuming that the average laser power during fabrication can be predicted. On the other hand, estimations based on tessellated (STL) representation, although not so accurate, satisfy the accuracy requirements imposed at early stages of the Stereolithography process, where no slice data are available. As part of this study, build-time itself is also analyzed and factors a!ecting it are identi"ed and investigated experimentally. Results indicate that hatching time depends not only on the hatching distance and speed, as originally assumed, but also on the number of hatching vectors employed.
... Socrates Moschuris is a Post-Doctoral Associate at the University of Piraeus. He earned his P... more ... Socrates Moschuris is a Post-Doctoral Associate at the University of Piraeus. He earned his Ph.D. degree from the University of Piraeus. ... When these decisions are made at lower levels, top management could be constrained in the choices available to them. ...
This article investigates diflerences in the structure of the purchasing function of enterprises ... more This article investigates diflerences in the structure of the purchasing function of enterprises buying different products and operating under different degrees of state control.
International Journal of Value Chain Management, 2008
During the last decade, electronic procurement has acquired a great number of supporters. Interne... more During the last decade, electronic procurement has acquired a great number of supporters. Internet-based procurement applications have significantly improved the overall supply chain operation. There is a lot of research regarding the effects of such applications on supply chain management. However, very little research exists regarding the organisational impact of such applications. In order to fill this gap, research was made within the framework of a European research project. More specifically, a questionnaire was designed and distributed to a number of industrial firms in six European countries. The results of the study suggest that respondents perceive a positive impact of e-procurement applications on issues such as employees' satisfaction, job formality, work and business relationships. The perceived impact on these issues varies among companies, depending on such variables as country, number of employees and sales turnover, and is not overshadowed by the e-tech sophistication of the subject companies.
International Journal of Retail & Distribution Management, 2005
... Bourlakis, MA, Bourlakis, CA (2001), "Deliberate and emergent logistics strategies in fo... more ... Bourlakis, MA, Bourlakis, CA (2001), "Deliberate and emergent logistics strategies in food retailing: a case study of the Greek multiple food retail sector", Supply ChainManagement: An International Journal, Vol. 6 No.4, pp.189-200. ...
International Journal of Man-Machine Studies, 1976
ABSTRACT The aim of this study was to examine how decision performance was affected by various am... more ABSTRACT The aim of this study was to examine how decision performance was affected by various amounts of input uncertainty in a laboratory scheduling task. Three levels of this variable were involved (no uncertainty, medium and high amounts of uncertainty). The experimental results showed that the introduction of uncertainty resulted in a considerable decrement in decision performance but rather surprisingly performance was not largely affected by variations in the amount of uncertainty.
ABSTRACT Subjects were required to control a relatively complex and slow-response laboratory proc... more ABSTRACT Subjects were required to control a relatively complex and slow-response laboratory process plant for a total of three hours. Output error and control movement scores were measured, and power spectral density and cross correlation functions were computed. The subjects' strategies were assessed by observation and from the responses to a questionnaire given after they had completed the experiment. The results show that when intermediate information from the plant is available, subjects tend to develop an anticipatory model, which enables them to control the plant more effectively than with output error feedback alone. Special instructions about the structure and dynamics of the plant tended to facilitate the development of the anticipatory model. Under the particular conditions of the experiment, a time-history record of the control settings and output error were of little value. It was found that observation of the output of a three-term automatic controller was of limited value as a training aid. In general, the human operator's strategies and information requirements were very different from those of the automatic controller.
ABSTRACT This paper presents an approach for the design and the validation of a prototype knowled... more ABSTRACT This paper presents an approach for the design and the validation of a prototype knowledge acquisition tool in the domain of business planning. Results from previous work in the area of problem-solving in business domain indicate that there are wide differences in both the ways problems are represented, and solution strategies are selected. These differences can have a significant effect on the suitability of knowledge acquisition techniques. The knowledge acquisition tool has been designed to accommodate these differences. Problem decomposition and simplification techniques are employed by the tool in order to elicit the appropriate information for managerial decision making. The prototype tool has been validated in the field with 35 managers using ten test scenarios. The results of the validation process are presented, and implications for the design of such tools in business domain are discussed.
Proper bicycle fit is very important for cycling performance, efficiency, comfort and injury prev... more Proper bicycle fit is very important for cycling performance, efficiency, comfort and injury prevention. This is especially true in the case of children cyclists that do not have the necessary cycling experience, balance and the fully developed musculoskeletal system of the adults. Bicycle fit depends on both the design and dimensions of the bicycle as well as on the anthropometric dimensions of the cyclist. In the present paper a case study concerning the ergonomic evaluation and redesign of a series of bicycles for children and teenagers 7-14 years old is presented. The study has been commissioned by a major Greek bicycle manufacturer who wanted to gain competitive advantage by introducing new anthropometrically-designed bicycles. Employing virtual modelling techniques and the method of Principal Component Analysis, bicycle affordance for selected representative cases and various bicycle sizes has been examined. Based on the results of the study redesign recommendations that improved bicycle fit for specific groups were proposed and a formal bicycle size selection method has been defined. The redesigned bicycles are now in full production and distribution is underway in many commercial outlets in Greece.
... Login to save citations to My List. Citation. Database: PsycINFO. [Book]. Man-machine systems... more ... Login to save citations to My List. Citation. Database: PsycINFO. [Book]. Man-machine systems; Information, control, and decision models of human performance. Sheridan, Thomas B.; Ferrell, William R. Cambridge, MA, US: The MIT Press. (1974). ix, 452 pp. Abstract. ...
After years lagging behind Scandinavian and other European Cities, in 2007, the city of London to... more After years lagging behind Scandinavian and other European Cities, in 2007, the city of London took the courageous initiative to transform itself from a follower to a leader and advocate of Green Public Procurement. In this paper, now that enough data is available, we present how the 2007-2010 Green Public e-procurement project was structured; the goals, accountabilities, results of the procurement portfolio-analysis, the significance of business transformation with e-procurement, the local performance Indicators which were used and the initial spend results of the project. Looking forward, reference is made to planed actions since 2009, regarding the future implementation of European Green Procurement directives and best practices from the supplychain domain. Today, Green Procurement is the central core of the new centrally managed public e-procurement strategy of the city of London which promises to yield significant cost savings and improved efficiencies in the 2010-2013 timeframe.
The work presented in this paper is addressed to the front-end phases of the development of a sys... more The work presented in this paper is addressed to the front-end phases of the development of a system supporting a complex decision-making task: high-level managerial planning in small-to-medium enterprises (SMEs). It attempts to identify characteristics of the competences possessed by experienced managers and used when taking high-level managerial planning decisions, and to assess their potential implications for system design. The
International Journal of Value Chain Management, Mar 20, 2015
During the last decade, electronic procurement has acquired a great number of supporters. Interne... more During the last decade, electronic procurement has acquired a great number of supporters. Internet-based procurement applications have significantly improved the overall supply chain operation. There is a lot of research regarding the effects of such applications on supply chain management. However, very little research exists regarding the organisational impact of such applications. In order to fill this gap, research was made within the framework of a European research project. More specifically, a questionnaire was designed and distributed to a number of industrial firms in six European countries. The results of the study suggest that respondents perceive a positive impact of e-procurement applications on issues such as employees' satisfaction, job formality, work and business relationships. The perceived impact on these issues varies among companies, depending on such variables as country, number of employees and sales turnover, and is not overshadowed by the e-tech sophistication of the subject companies.
• Warehouses are important links between the production sites and the customers • Need to shorten... more • Warehouses are important links between the production sites and the customers • Need to shorten the throughput times in the supply chain • Need for faster response to customer demand -Fluctuations in customer demand -Increase in the frequency of orders -Decrease in the size of orders -Increase in product proliferation • Trade-offs between warehouse costs and delivery performance "Warehouse management for improved order picking performance", Zakynthos 2005 2 Warehousing performance Warehousing performance
International Journal of Operations & Production Management, 2001
... Socrates J. Moschuris, University of Piraeus, Piraeus, Greece. ... personnel), formalisation ... more ... Socrates J. Moschuris, University of Piraeus, Piraeus, Greece. ... personnel), formalisation (ie extent to which purchasing tasks are defined by formal documents), centralisation (ie extent to which purchasing responsibilities are delegated among several lower managerial levels ...
Robotics and Computer-Integrated Manufacturing, 2001
In this paper the problem of build-time estimation for Stereolithography systems is examined. Exp... more In this paper the problem of build-time estimation for Stereolithography systems is examined. Experimental results from various case studies indicate that the accuracy of estimation greatly depends on the type of part geometry representation processed and the uncontrolled laser power #uctuations. It is shown that estimation based on sliced (CLI) representation can be extremely accurate, assuming that the average laser power during fabrication can be predicted. On the other hand, estimations based on tessellated (STL) representation, although not so accurate, satisfy the accuracy requirements imposed at early stages of the Stereolithography process, where no slice data are available. As part of this study, build-time itself is also analyzed and factors a!ecting it are identi"ed and investigated experimentally. Results indicate that hatching time depends not only on the hatching distance and speed, as originally assumed, but also on the number of hatching vectors employed.
... Socrates Moschuris is a Post-Doctoral Associate at the University of Piraeus. He earned his P... more ... Socrates Moschuris is a Post-Doctoral Associate at the University of Piraeus. He earned his Ph.D. degree from the University of Piraeus. ... When these decisions are made at lower levels, top management could be constrained in the choices available to them. ...
This article investigates diflerences in the structure of the purchasing function of enterprises ... more This article investigates diflerences in the structure of the purchasing function of enterprises buying different products and operating under different degrees of state control.
International Journal of Value Chain Management, 2008
During the last decade, electronic procurement has acquired a great number of supporters. Interne... more During the last decade, electronic procurement has acquired a great number of supporters. Internet-based procurement applications have significantly improved the overall supply chain operation. There is a lot of research regarding the effects of such applications on supply chain management. However, very little research exists regarding the organisational impact of such applications. In order to fill this gap, research was made within the framework of a European research project. More specifically, a questionnaire was designed and distributed to a number of industrial firms in six European countries. The results of the study suggest that respondents perceive a positive impact of e-procurement applications on issues such as employees' satisfaction, job formality, work and business relationships. The perceived impact on these issues varies among companies, depending on such variables as country, number of employees and sales turnover, and is not overshadowed by the e-tech sophistication of the subject companies.
International Journal of Retail & Distribution Management, 2005
... Bourlakis, MA, Bourlakis, CA (2001), "Deliberate and emergent logistics strategies in fo... more ... Bourlakis, MA, Bourlakis, CA (2001), "Deliberate and emergent logistics strategies in food retailing: a case study of the Greek multiple food retail sector", Supply ChainManagement: An International Journal, Vol. 6 No.4, pp.189-200. ...
International Journal of Man-Machine Studies, 1976
ABSTRACT The aim of this study was to examine how decision performance was affected by various am... more ABSTRACT The aim of this study was to examine how decision performance was affected by various amounts of input uncertainty in a laboratory scheduling task. Three levels of this variable were involved (no uncertainty, medium and high amounts of uncertainty). The experimental results showed that the introduction of uncertainty resulted in a considerable decrement in decision performance but rather surprisingly performance was not largely affected by variations in the amount of uncertainty.
ABSTRACT Subjects were required to control a relatively complex and slow-response laboratory proc... more ABSTRACT Subjects were required to control a relatively complex and slow-response laboratory process plant for a total of three hours. Output error and control movement scores were measured, and power spectral density and cross correlation functions were computed. The subjects' strategies were assessed by observation and from the responses to a questionnaire given after they had completed the experiment. The results show that when intermediate information from the plant is available, subjects tend to develop an anticipatory model, which enables them to control the plant more effectively than with output error feedback alone. Special instructions about the structure and dynamics of the plant tended to facilitate the development of the anticipatory model. Under the particular conditions of the experiment, a time-history record of the control settings and output error were of little value. It was found that observation of the output of a three-term automatic controller was of limited value as a training aid. In general, the human operator's strategies and information requirements were very different from those of the automatic controller.
ABSTRACT This paper presents an approach for the design and the validation of a prototype knowled... more ABSTRACT This paper presents an approach for the design and the validation of a prototype knowledge acquisition tool in the domain of business planning. Results from previous work in the area of problem-solving in business domain indicate that there are wide differences in both the ways problems are represented, and solution strategies are selected. These differences can have a significant effect on the suitability of knowledge acquisition techniques. The knowledge acquisition tool has been designed to accommodate these differences. Problem decomposition and simplification techniques are employed by the tool in order to elicit the appropriate information for managerial decision making. The prototype tool has been validated in the field with 35 managers using ten test scenarios. The results of the validation process are presented, and implications for the design of such tools in business domain are discussed.
Proper bicycle fit is very important for cycling performance, efficiency, comfort and injury prev... more Proper bicycle fit is very important for cycling performance, efficiency, comfort and injury prevention. This is especially true in the case of children cyclists that do not have the necessary cycling experience, balance and the fully developed musculoskeletal system of the adults. Bicycle fit depends on both the design and dimensions of the bicycle as well as on the anthropometric dimensions of the cyclist. In the present paper a case study concerning the ergonomic evaluation and redesign of a series of bicycles for children and teenagers 7-14 years old is presented. The study has been commissioned by a major Greek bicycle manufacturer who wanted to gain competitive advantage by introducing new anthropometrically-designed bicycles. Employing virtual modelling techniques and the method of Principal Component Analysis, bicycle affordance for selected representative cases and various bicycle sizes has been examined. Based on the results of the study redesign recommendations that improved bicycle fit for specific groups were proposed and a formal bicycle size selection method has been defined. The redesigned bicycles are now in full production and distribution is underway in many commercial outlets in Greece.
... Login to save citations to My List. Citation. Database: PsycINFO. [Book]. Man-machine systems... more ... Login to save citations to My List. Citation. Database: PsycINFO. [Book]. Man-machine systems; Information, control, and decision models of human performance. Sheridan, Thomas B.; Ferrell, William R. Cambridge, MA, US: The MIT Press. (1974). ix, 452 pp. Abstract. ...
After years lagging behind Scandinavian and other European Cities, in 2007, the city of London to... more After years lagging behind Scandinavian and other European Cities, in 2007, the city of London took the courageous initiative to transform itself from a follower to a leader and advocate of Green Public Procurement. In this paper, now that enough data is available, we present how the 2007-2010 Green Public e-procurement project was structured; the goals, accountabilities, results of the procurement portfolio-analysis, the significance of business transformation with e-procurement, the local performance Indicators which were used and the initial spend results of the project. Looking forward, reference is made to planed actions since 2009, regarding the future implementation of European Green Procurement directives and best practices from the supplychain domain. Today, Green Procurement is the central core of the new centrally managed public e-procurement strategy of the city of London which promises to yield significant cost savings and improved efficiencies in the 2010-2013 timeframe.
Uploads
Papers by Lambros Laios