Mechanical Engineering Session
Chair: G. Besseris – K. Dimakos –A. Kondili - C. Stergiou
B.5.1. Contemplation of Globalisation and Economic Crisis by a Systems Engineer
Prof. DrScTech. Konstantinos N. Spentzas
Chief Academician Secretary of the
Euro-MediterraneanAcademy of Arts & Sciences
Digeni 5A, 16673 Voula
E-Mail:
Abstract
The scope of this paper is to contemplate economic crisis that strikes the global economic system by use of the theory of systems.
Starting from the definition of a system, we show the similarity of the global economic system to technical systems that engineers are dealing with; the same mathematical laws govern its behaviour and permit to predict its evolution when disturbances are applied.
Moreover, comparing the global economic system to national economic systems of the previous century, we give emphasis to the fact that the global economic system is a system without environment, witch means that no disturbance are applied by the environment to the system, that is all disturbances come from the elements or the sub-systems of this system. On the basis of this, we discuss stability of the global economic system and try to give a deeper explanation of the economic crisis that strikes many countries of the western world, including USA and several European Union countries.
B.5.2. Applying SIPOC diagram in Project Quality Management. A theoretical approach
K. St.Kousouris1, G. J.Besseris2 and P.H.Yannakopoulos3
1Project Manager, B.Sc. in B.A, M.Sc. in P.M, PMP candidate.
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2 Chemical Engineer, Quality Advisor.{}
3Technological Education Institute of Piraeus, Thivon 250, GR-12244 Aigaleo
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Abstract
Project Management methodology is based on three major constraints related with the project deliverable. These constraints are the time, the budget and the resources needed for accomplishing a project. While projects becoming more complex a new constraint occurred and is related with quality issues and how projects are satisfying the customer’s (internal or external) needs. Quality management is one of the knowledge areas of Project Management and targets to meet customers’ expectations by providing high quality results.
Six Sigma is a quality methodology initiated in projects both in industry and service sector. The integration of Quality and Project Management comes in the form of Project Quality Management. The aim of this paper is to examine how a Six Sigma tool can be used in Project Quality Management system while a project is undertaken.
Keywords: Project Management, sector, customers, suppliers, processes, six sigma, total quality management
B.5.3. SPC System Implementation on an Ammunition Production Line
of a Large Defense Manufacturer
C. Apostolopoulos, G. Besseris and C. Stergiou
MSc Advanced Industrial Manufacturing Systems
KingstonUniversity
Kingston upon Thames, UK
Tel: +44 (0)20 8417 9000,
Deparment of Mechanical Engineering,
TEI of Piraeus
Aigaleo, Attica, Greece
Email Address: , ,
Abstract
This project aims to present the first trial of implementation of a Statistical Process Control (SPC) System in the production line of large caliber ammunition in a Hellenic defensive industry. At the same time solutions to specific problems (defects) will be given with the use of known tools like Pareto analysis, FMEA analysis and Cause and Effect analysis. All the above delimit a trial for quality optimization of the specific product. The product (large caliber cartridge case) is produced in many phases where it is being forged, drawned, milled, turned, thermal treated, chemically treated etc. It is controlled for its quality using classic quality control methods and the results of the measurements are estimated with the use of SPC. Then the results of the SPC study are analyzed with the Pareto method to find the most important ones. Then using FMEA and Cause and Effect analysis the reasons causing them are found in order for a corrective action to be performed.
Keywords: Statistical Process Control, defensive industry, Pareto Analysis, FMEA, Cause and Effect Analysis.
B.5.4. Reverse engineering method development for point-cloud sectional slicing using nurbs fitting
Constantinos Stergiou1, Dimosthenis Kozanitis2, Sotirios Kavouras3
MSc in Advanced Industrial and Manufacturing Systems, TEI of Piraeus-MechanicalEngineeringDepartment & KingstonUniversity London- Faculty of Engineering
email: , ,
Abstract
Reverse Engineering (RE) is a modern technology in design engineering which refers to the process of creating a computational geometric model of a physical object of which no blueprint data is available or when the accuracy of that physical part is to be verified by comparing it to its nominal dimensions. Applying this technology in many areas of design industry, a powerful tool for complete surface reconstruction is introduced. However, since 3D laser scanner systems have become more popular among several other RE acquisition methods, mainly for their ability to produce pointcloud data from complex free-form objects in significantly less time, the claim for accurate CAD models has led to extensive research upon the reverse engineering methodology. Nevertheless, the majority of the research focuses on creating the physical object’s CAD model by constructing the mesh of the point-cloud and then fit it with the appropriate surfaces. This paper deals with an alternative approach where a meshless reverse engineering method for adequately slicing a point-cloud and approximating the resulted sectional profiles with NURBS curves is presented. In addition, this method is implemented by developing a reverse engineering program within a commercial CAD system by using its Application Programming Interface. The method was successfully applied to a 10-meter hull of a Greek shipyard company as a case study.
Keywords: CAD, Reverse Engineering, Point-Cloud, Slicing, API, NURBS
B.5.5. Implementationof theISO 9001 quality control system toa virtualmanufacturingindustry of cannedpeaches.
A. Moraitou1, G. Besseris2, C. Stergiou3
MSc Advanced Industrial Manufacturing Systems
KingstonUniversity
Kingston upon Thames, UK
Tel: +44 (0)20 8417 9000,
Department of Mechanical Engineering,
TEI of Piraeus
Aigaleo, Attica, Greece
E-mail: , ,
Abstract
ISO 9001 is an internationally recognized standard for quality assurance and quality management business. Business model is applied to ensure the expected quality of products and services offered by a company. This quality control system applied on the processes that produce products and services offered by an organization. [1]
This article will submit the implementation of quality control system ISO 9001 in a virtual industry of canned peaches. A process production flow chart will be presented, combined with a summary report about each stage. Then will be identified the hazards, will be installed the precautionary measure, will be set the critical control points for which the industry is obligated to apply the corrective actions if a mistake happens, and the critical points. Also very important is the establishing of a monitoring system of the critical points and the critical control points and procedures or verification and archiving. Finally significant is the measurement and analysis of critical indicators of which they determine the success of implementing the standard.
B.5.6. Digital ISO Document Management
D. Statharas1, G. Besseris2, C. Stergiou3
MSc Advanced Industrial Manufacturing Systems
KingstonUniversity
Kingston upon Thames, UK
Tel: +44 (0)20 8417 9000,
Deparment of Mechanical Engineering,
TEI of Piraeus
Aigaleo, Attica, Greece
E-mail: , ,
Abstract
ISO standards were primarily created in order to ensure the desirable characteristics of products and services. These standards created systems in order to improve productivity and quality of products and services.[1] Nowadays every company that wants to be competitive and produce high quality products or services follows the ISO standards and has applied at least one ISO system. The appliance of an ISO system in a company means that a manager is responsible for the maintenance of the system and has to face a lot of paperwork. Given that managing high amount of hard copies is difficult the need for software that can manage documents but follow the rules of the ISO standards came up. This paper documents the early steps of developing a software application that handles documents of ISO systems digitally. In order to achieve this, waterfall model will be used.[2] The requirements specifications and functional specifications will be gathered and analyzed.[3]
References:
[1] , Information about ISO systems, last date of access 25/6/2011.
[2]Thomas T. Barker, “Documentation for Software and IS Development”, Encyclopedia of Information Systems, pp. 683-693, November 2004.
[3]AM. Davis, “System testing: Implications of requirements specifications”, Information and Software Technology, Volume 32, Issue 6, pp. 407-414, July - August 1990.
B.5.7. Planning of quality control systems (ISO 9001:2000) and control of food safety (ISO 22000:2005) in apiary
Aikaterini A. Tzialla* and George J. Besseris**
Postgraduate Program (MSc) in Quality Assurance
School of Science and Technology
Hellenic Open University
Patras, 26335, Greece
* E-mail address:
**E-mail address:
Abstract
In the frame of the open and free market the distribution of qualitative and safe products is of vital importance for the guarantee of the public health as well as for the survival of foods enterprises. For this reason the distribution of Greek honey in the international markets should be accompanied by certificates of appropriateness, quality and safety in order to attract the extended consumers. Therefore the conformity with the existing legal and lawful provisions is of vital importance for the economic prosperity of apiarian enterprises the application of models ISO 9001:2000 and ISO 22000:2005.
With the application of model ISO 9001:2000 the apiarian enterprise ensures the quality in all the levels of operation of enterprise. By the assessment of application of model it is realised that the application of Quality Management System constitutes tool for each enterprise as it modernises the internal organisation and operation. Simultaneously it constitutes proof for the customers that in this food enterprise are produced qualitative products according to the agreement characteristics.
With the application of model ISO 22000:2005 the apiarian enterprise ensures the safety of products, in other words it is ensured the achievement of products safe and healthy for human consumption. After the application of the model the profits are multiple as the enterprise can control the dangers satisfactory and can produce safe products according to current legislation.
B.5.8. Customer Satisfaction Study in Commercial Ferry-Boat Services
Vaios Konstantinidis* and George Besseris**
Quality Management Program
TEI Piraeus and The University of the West of Scotland
Methonis 8-10, Athens, Attica, Greece
Email address:* , **
Abstract
Transportation companies realize the pertinence of the quality performance of their services as they are registered in customer satisfaction surveys. Therefore, such companies strive to develop mechanisms and check-points that allow them to focus on raising their performance standards and associated financial results.
This research work looks into customer satisfaction in a specific sea line company in Greece within the framework of Service Quality in the specialized shipping sector.
It presents the results of the survey data which was conducted on board. Subsequently, we present and comment on the analysis’ procedure, placing emphasis on the findings with the aim to revealing potential factors in need of improvement.
This presentation employed a managerial instrument to gauge customers’ perception of quality of services, which was further developed by the authors with respect to describe the quality level of the sea-liner the basis of SERVPERF model. According to this model, a customer satisfaction questionnaire for collecting data directly at the passenger level was created which was pretested with a pilot survey. Based on the derived information, it was revealed that there is statistical significance on passengers’ perceived satisfaction at the end of their trip with respect to individual services offered on board by the sea-liner. Moreover, this study examines several quality factors by stratifying the research among different carriers of the same company. We took in account for each quality factor cross characteristics such as the demographic background of the passengers. Finally, there are some improvements and remedial actions suggested with a view to achieving maximum customer satisfaction, along with a series of recommendations for future study.
B.5.9. Telematics of a quad copter U.A.V. with the use of an android device
T. Eleftherakos, N. Chronas-Foteinakis, G. Nikolaou, K. Alafodimos
T.E.I. Piraeus Automation Department, P. Ralli and Thivon Aigaleo, Greece
Email: , , ,
Abstract
The last years many changes have been made in electronics and sensor technology.. The result was the development and production of small and medium size unmanned aircraft vehicles. Most of the research has been done by universities, hobbyists and the military enterprise. Quad copter which is a variant of U.A.V, has been studied extensively because of its unique properties that makes it stealth, its steady camera platform and its ability to fly indoors as well as outdoors. Through the introduction of the android operating system for handheld devices, Google has flooded the mobile phone market with an operating system based on Linux. The basic advantage is that open source makes it ideal for software development especially in the area of robotics where the cost of an android phone is affordable compared to smart phones that are functioning though different operating systems. In the presented paper we will describe how to develop software in order to control the numerous flight parameters of a quad copter and to present real time telemetry of different sensors through the use of an android mobile phone.
Keywords: Quad Copter, U.A.V., Android.
B.5.10. A Study to the Bullwhip Effect. The theoretical underpinning to the causes and its consequences on the performance of Supply Chains
Apostolos K. Lazaris
BusinessCollege of Athens, Computer Science Department, 4 Dimitressa st., 11528 Athens
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Abstract
An issue that plays a very critical role in the supply chain, and is becoming increasingly significant, is the Bullwhip Effect (or Whiplash Effect). The reason we refer to this phenomenon is that it is reinforced by distorted information -which may be due to information asymmetry- spread across the supply chain.
It is a phenomenon observed in (forecast driven) distribution channels, and is considered the application of chaos theory to supply chain. Supply chains are nonlinear dynamic systems, and a chaotic behaviour emerges as a self-fulfilling prophecy. The Bullwhip Effect can be defined as follows: Demand variability increases upwards the supply chain, and small variations in consumer demand may result in large variations in orders placed upstream.
We will study a number of approaches to the causes of the Bullwhip Effect as well as its critical consequences on the performance (efficiency and effectiveness) of Supply Chains. We will illustrate that it can be reduced by centralising demand information, i.e. providing each stage with complete information on demand. Furthermore, for quantifying the phenomenon, we will present the appropriate mathematical underpinning, which leads to a better understanding of it and to methods that can restrain its presence.
Keywords:Bullwhip Effect, information asymmetry, supply chain
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