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Life cycle engineering


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Life cycle engineering

  1. 1. Life cycle engineering, Service Engineering RODRIGUEZ-PEREZ Samuel A Tool for Service Engineering, Evaluation and QuantificationAbstract This report is about the life cycle engineering, have been studied 2 scientific papers on service engineering, this method supports both the representation of services and their design. First, we begin by a summary of the main scientific points of the 2 texts and then a review on the proposed model in the texts, and finally study of the service assessment techniques proposed in the text.SummaryTo solve current industrial problems, manufacturers need to supply service rather than materializedproducts to consumers. We propose a novel engineering paradigm to deal with services, serviceengineering. We define services as a state change. A service model consists of three sub-models:scope model, view model and flow model. A computer-aided design tool, called Service Explorer, isdeveloped to represent a network of the parameters and determines the influence weight oneanother.We should reduce the production and consumption volume of artifacts to an adequate, manageablesize to solve environmental problems although we do not want to make our quality of life lower thannow. Consequently, we must aim at qualitative satisfaction rather than quantitative sufficiency, andthus the decoupling of economic growth from material and energy consumption. A service is definedas an activity that changes the state of a service receiver, a provider causes, usually withconsideration, a receiver to change from a state to a new state that the receiver desires, where bothcontents and a channel are means to realize the service.The design of a service is also a search for both physical and non-physical structure, but it differsfrom the conventional design in terms of evaluation. The design of a service is based on the degreeof satisfaction with the state change of the receiver. Therefore, it is necessary to express statechanges by means of the received contents.Thus we introduced three kinds of sub-models using the above-mentioned parameters in order torepresent a whole functional service structure: (a) flow model, (b) view model and (c) scope model.Flow model. When we focus on the relationship between a receiver and a provider, manyintermediate agents exist among them. In this research, we call the sequential chain of bothcontents and channels a flow model of a service.View model. Receiver state parameters (RSPs) change according to how the receiver evaluatessubjectively the received contents. A single RSP may consist of several CoPs because the receiverevaluates the contentsScope model. In comparison to the view model in which a single RSP is expressed, the scopemodel can deal with all RSPs within the providers and the receivers. In other words, a scope modelhandles multiple view models, namely multiple RSPs. Thus, it helps designers to understand thereal activities between the two.We have developed a prototype system of a computer aided modeling tool for service design, whichis called Service Explorer. Designers can describe services, and register them in a database. Tomodel services on the Service Explorer, we register services in the database as scope models, andedit, evaluate, search the services through these scope models. A typical procedure is as follows:• Define various RSPs and then express each view model of RSP respectively.• Generate a scope model by means of binding multiple view models of a receiver and of selectingtheir initial providers.• Edit function parameters in each view model, and change the arcs between function units. 1
  2. 2. Life cycle engineering, Service Engineering RODRIGUEZ-PEREZ SamuelTo develop services effectively and efficiently, a computer-aided design system for service isessential. The authors have proposed a prototype system of Service CAD called ‘Service Explorer’.Values of services are evaluated privately and subjectively by consumers. The role of service hasbeen expanding in our modern society. The authors proposed a methodology on service design‘Service Engineering’. The purpose of the study is to make consumers more satisfied with highquality contents rather than with much material and energy consumption.Service Engineering aims at design methodology of services, which is defined as ‘an activity by aservice provider to change the states of a service receiver’. A service is considered as delivery of‘service contents’ with ‘service channels’. Service contents are material, energy, or information,which change the receiver’s state directly. Service channels transfer, amplify, and control servicecontents.Parameters representing the states of service contents are called ‘Content Parameters (CoPs).’ Inthe same way, those of service channels are ‘Channel Parameters (ChPs).’ The parameters havemutual relationships.The purpose of Service Engineering is to have a technological design tool on services. A methodhas been proposed by authors. To determine the importance of each parameter, a designerdetermines weight on each parameter with QFD (Quality Function Deployment).The authors have implemented ‘Service Explorer’ since 2002. It has been implemented with JAVASDK ver.1.4.0 and XML version 1.0, thus it has very high portability. Its executable file isapproximately 2MB in size and can run on Windows 98/2000/XP and Macintosh OS X environmentwith at least 64 MB RAM. 2
  3. 3. Life cycle engineering, Service Engineering RODRIGUEZ-PEREZ Samuel Service Modelling ProposedPresenting the way of modeling a service is necessary bear in mind that a service is a model ofscope and that it consists of the following elements: (a) the service provider and receiver, (b) a setof PSR (state parameters receptor) receptor, (c) the structure and function.Within the modeling of a service we have three types of sub-models, these are:a) Flow model, represents a stream of services, which may consist of content and channels, agentshave intermediate features double of a receiver and a provider, "an intermediate."b) View model, represents the relationship between the PSR (receiver state parameters ), and ChPs (channels parameters ) from the viewpoints of their duties. In this model, relationships are visuallydepicted in a tree structure. Well structured according to the parameters expected by the receiverdirectly without intermediariesc) Scope model, compared to the view model in which a PSR is expressed a driving range modelview various models, namely multiple RSPs. Therefore, it helps designers to understand the actualactivities between the two.As a computer support for modeling services has developed a very efficient software, this is aprototype of a modeling tool for computer aided design services, called Service Explorer. "Designers can describe the services and register in a database.Using these models, we can deploy highly complex and subjective service as a chain of serviceagents, and represents the structure of the performance of service as a functional structure.One possible proposal to initiate a service can be modeled with the following structure:1) Select Service agents and express their functions.2) Determine the weight of all the agents and their PSR.3) Generate a QFD matrix of this service.4) Search for design solutions that can enhance the current service.During the modeling phase of a service is possible to understand this as the search for physical andnonphysical structure for the service to find the desired function. The design of a service is basedon the degree of satisfaction and the change of state of the receiver. Therefore, it is necessary toexpress the state changes through the service received.In this short report on service modeling can be understood clearly that there are different forms ofmodeling, the choice of one of these will always depend on the service in question, since there maybe services that require the modeling of flow model and others who demand either view model orscope model, and will always be helpful to use a computer-aided software, in this case, theproposed "Service Explorer". The modeling of a service is the first step for engineering services. Asan industrial engineer is very necessary to know and deal with a service address through structuresthat allow us to know perfectly understand and analyze the content of the service in order tointroduce some improvement to achieve efficiency in this. I believe that engineering services ismuch more complex than what occurred in these two articles, but is a base to start understanding. 3
  4. 4. Life cycle engineering, Service Engineering RODRIGUEZ-PEREZ Samuel Service Assessment TechniquesThe aim of engineering service is of having an instrument of technological design on services. Theevaluation on services, therefore, is the most important key problem. A method has been proposed by the authors, this one treats himself about a system prototype ofservice of so called CAD " Service Explorer ", is used so much in the phase of modeling like in theevaluation of services. Here the values of the services are evaluated private road and subjectively.To determine the importance of every parameter, a designer determines the weight of everyparameter with QFD (Quality Function Deployment). The options of improvement of a service canbe obtained by the decomposition of the importance of every RSP. Every RSP with the support ofseveral components. The method AHP (analytical hierarchic Process) and the method DEMATELuse to determine the importance of the components of each one.This owes, to that they are powerful methods of quantification of the subjective factors. Theprocedure of the evaluation is the following one: 1) All the recipients that appear in a model of flow are weighted from the point of view of thesupplier by AHP.2) In the following hierarchy, the PSR of every recipient are weighted also by AHP.3) The weight of every RSP divides between the parameters of his function of frame, that is to say,CoPs and cogeneration, with DEMATEL.4) The counterfoil of correlation in QFD is generated between RSPs and FPs for every receptor thatuses the weight of both RSPs and FPs. 5) The Importance of the punctuations for the whole FPs of all the recipients they are discussed asthe product of sum of the vector I weigh and the relation of the vector forces. Till now we have explained the form of evaluation of a service and can observe that to achieve amore efficient evaluation of a service, a software is very necessary even essentially, for it in thisarticle, one has proposed the utilization of a system of computer-aided design, treats itself about asystem prototype of service " Service Explorer ". His principal function is “the evaluation of thevalues of the services on the part of the consumers”. This way, several methodologies of designhave been introduced to reach a major field of comprehension as for example QFD (QualityFunction Deployment) and AHP (Analytical Hierarchic Process) with it achieves the evaluation ofthe satisfaction of the client. In spite of the fact that it is one of the systems that according to theauthor is very effective and manageable, will be necessary to stress that as any system, it does notgenerate for if only the automatic awaited results, if not that must interfere coherent and logicalinformation.Then we understand that for the evaluation of services and to give him a major efficiency andefficiency to the method of evaluation, software is necessary represented by computer which allowsdoing the much more advanced evaluation.With Explorer the users can analyze and evaluate components of the service, and with it, the sameuser will be able to propose different plans to accede to the improvement of a service. 4