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Figure 1. The Program Package Relationship in the Integrated Information System
Based on the above description of the activities, then the needs of the system in this travel agency company is an integrated system, which can handle 4 (four) main activities of the company, namely reservation, accounts receivable, accounts payable and financial reporting . Each of these activities will be handled by a separate program package, but internally (data) these four programs are integrated with each other. Figure 1 shows the linkage of all four existing program packages.
Reservation System program package is a program package used for recording and managing reservation data of guest. The program package is also equipped with Service Handling, Creating Invoice and Creating Profit Loss facilities for selected reservation data. Service handling facilities are used for the management of service products provided for the guests concerned and the operational preparation and tour activity of guests. Inviting facility invoices are used to issue invoices on behalf of guests related to the service packs they order. The facility of creating profit loss is a facility to know the amount of gross profit / loss from certain guest reservation data.
AR System (Account Receivable System) program package is a program package specifically used to handle accounts receivable company to agents who have sent their guests [15]. As previously described, all guest bills on tour packages purchased are charged or incurred by the agent who sent them. Registration of billing to the agent of the guest who sent it can be done in the package of Reservation System program or AR System package. Specifically, this bill data is managed in this system.
AP System (Account Payable System) program package is a program package specifically designed to handle the company's account payable problem [15]. Company's account payable occurs as a result of a company purchasing a product from a supplier provided to a guest for the service purchased in the reservation. Purchase of products is done on credit, and usually will be billed payment through the invoice delivery to the company after the guests finished enjoying the product service. The invoice's invoice from the supplier is then recorded as a account payable by the company.
Accounting System program package is a package of programs that are specifically used to handle the preparation of corporate financial statements. As a package of programs that deal with corporate financial reporting, indirectly this program package is also associated with AR System and AP System which specifically deals with the problem of accounts receivable and payable, as previously described.
Design of the System
After successfully investigating the existing problems, then we can do the next stage in system development is the design stage. At this stage we create a blueprint of the built system. Blueprint in the form of modules of the system can be determined by creating a class diagram of the system. A class is the description of a concept from the application domain or the application solution. Classes are the center around which the class view is organized; other elements are owned by or attached to classes [16].
Classes that belong to this system can be seen in Figure 2. The whole class can be grouped into 3 (three) groups, namely Boundary class, a class that limits the interaction between systems with other worlds, Control class, which is the class that controls other class calls, which has rules of the business, and Entity class, a class that stores information that may later be stored on storage media [17].
The control class is frmMainMenu which will control the entire calling of the existing class. FrmMainMenu will be divided into 4 (four), adjusted to the number of existing program packages, frmRSVSystem for the Reservation System program package, frmAPSystem for Account Payable System, frmARSystem for Account Receivable System and frmAccountingSystem for Accounting System.
Entity class includes Employee which is used to record employee data and at the same time as user of system, Agent for agent data that sending guest, Supplier for supplier data providing service product, Reservation for reservation tour data, Guide for tour guide data, Account for account data company, and Journal for financial transaction data.
Figure 2 shows that the Employee class, which is a representation of the system user, has 2 (two) sub-classes: Manager and Admin, representing each of the other levels of the user. The user of this system is divided into 3 (three) levels adjusted to the scope of what the user can do in the existing
program package. Users with Manager Level, in addition to perform activities as well as users generally, can also perform the editing of existing data. While for Admin level users, in addition to doing data editing, can also perform data deletion. Only Admin users have data deletion authority.
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