【文章內(nèi)容簡介】 in the this method can be characterized by indicating only two nodes) and the corresponding routes where these nodes belong to. The number ofiterations that arcs’mobility is restricted is known as tabu list size or tabu tenure. The management of the tabu list is achieved by removing the move which has been on the tabu list longest. . Aspiration criterion The aspiration criterion is a strategy for overriding the shortterm memory functions. The tabu search method implemented, uses the standard aspiration criterion: if a move gives a higher quality solution than the best found so far, then the move is selected regardless its tabu status. Tabu Search algorithm terminates when the number of iterations conducted is larger than the maximum number of iterations allowed. 3. Developing the interbased application tool Web services offer new opportunities in business landscape, facilitating a global marketplace where business rapidly create innovative products and serve customers better. Whatever that business needs is, Web services have the flexibility to meet the demand and allow to accelerate outsourcing. In turn, the developer can focus on building core petencies to create customer and shareholder value. Application development is also more efficient because existing Web services, regardless of where they were developed, can easily be reused. Many of the technology requirements for Web services exist today, such as open standards for business tobusiness applications, missioncritical transaction platforms and secure integration and messaging products. However, to enable robust and dynamic integration of applications, the industry standards and tools that extend the capabilities of to days businesstobusiness interoperability are required. The key to taking full advantage of Web services is to understand what Web services are and how the market is likely to evolve. One needs to be able to invest in platforms and applications today that will enable the developer to quickly and effectively realize these benefits as well as to be able to meet the specific needs and increase business productivity. Typically, there are two basic technologies to be implemented when dealing with interbased applications。 namely serverbased and clientbased. Both technologies have their strong points regarding development of the code and the facilities they provide. Serverbased applications involve the development of dynamically created web pages. These pages are transmitted to the web browser of the client and contain code in the form of HTML and JAVASCRIPT language. The HTML part is the static part of the page that contains forms and controls for user needs and the JAVASCRIPT part is the dynamic part of the page. Typically, the structure of the code can be pletely changed through the intervention of web server mechanisms added on the transmission part and implemented by serverbased languages such as ASP, JSP, PHP, etc. This es to the development of an integrated dynamic page application where user desire regarding problem peculiarities (calculating shortest paths, execute routing algorithms, transact with the database, etc.) is implemented by appropriately invoking different parts of the dynamic content of such pages. In serverbased applications all calculations are executed on the server. In clientbased applications, JAVA applets prevail. Communication of the user is guaranteed by the wellknown JAVA mechanism that acts as the medium between the user and code. Everything is executed on the client side. Data in this case have to be retrieved, once and this might be the timeconsuming part of the transaction. In serverbased applications, server resources are used for all calculations and this requires powerful server facilities with respect to hardware and software. Clientbased applications are burdened with data transmission (chiefly related to road work data). There is a remedy to that。 namely caching. Once loaded, they are left in the cache archives of the web browser to be instantly recalled when needed. In our case, a clientbased application was developed. The main reason was the demand from the users point of view for personal data discretion regarding their clients. In fact, this information was kept secret in our system even from the server side involved. Data management plays major role in the good function of our system. This role bees more substantial when the distribution takes place within a large and detailed road work like this of a major plex city. More specifically, in order to produce the proposed the routing plan, the system uses information about: ? the locations of the depot and the customers within the road work of the city (their coordinates attached in the map of the city), ? the demand of the customers serviced, ? the capacity of the vehicles used, ? the spatial characteristics of road segments of the work examined, ? the topography of the road work, ? the speed of the vehicle, considering the spatial characteristics of the road and the area within of which is moved, ? the synthesis of the pany fleet of vehicles. Consequently, the system bines, in real time, the available spatial characteristics with all other information mentioned above, and tools for modelling, spatial, nonspatial, and statistical analysis, image processing forming a scalable, extensible and interoperable application environment. The validation and verification of addresses of customers ensure the accurate estimation of travel times and distances travelled. In the case of boundary in the total route duration, underestimates of travel time may lead to failure of the programmed routing plan whereas overestimates can lower the utilization of drivers and vehicles, and create unproductive wait times as well (Assad, 1991). The data corresponding to the