The Triple Nickle 555 Housing Coop: External Entities And To

The Triple Nickle 555 Housing Coop: External Entities and Top-Level DFD

The Triple Nickle (555 Housing Coop) in Queens, NY, is managed by a series of external entities that facilitate its daily operations, financial management, and strategic planning. These external entities include the residents (shareholders), the Management Company (Burnham Management Group), suppliers, subcontracted security firms, and the Board of Directors (BOD). The processes involve residents paying maintenance fees, BM managing daily operations and finances, suppliers providing building materials, Synoptic Security providing security services, and the BOD overseeing financial planning and policy decisions.

To illustrate the overall system, a high-level Data Flow Diagram (DFD) is constructed. This diagram captures the key external entities, their interactions with the system, and the flow of information and resources among them. The main components include the residents who contribute revenue through maintenance fees, BM who manages finances, staff, inventory, and reports, suppliers that fulfill material requests, security subcontractors, and the BOD which oversees the budget and strategic decisions.

Draw a top level DFD

In the top-level DFD, the key external entities are depicted as boxes outside the system boundary. The system itself can be represented as a central process labeled "555 Housing Coop Management System," which manages financial transactions, inventory, reporting, and compliance with BOD directives. The external entities interact with this central process as follows:

• Residents: Provide maintenance payments and receive reports.
• Management Company (BM): Processes payments, manages staff, orders supplies, verifies inventory, and generates financial and operational reports.
• Suppliers: Receive Material Request Notes (MRNs) from BM and deliver supplies.
• Synoptic Security: Provides security staff payroll data to BM.
• Board of Directors (BOD): Receive reports, give budget instructions, and issue memos for surplus cash allocations.

The data flows include maintenance fee payments from residents to BM, inventory and expense data from BM to suppliers, security payroll data from security firm to BM, financial reports from BM to BOD, and budget/memo instructions from BOD to BM. The overall DFD provides a clear view of how external entities interact with the internal management system, supporting the operational, financial, and strategic functions of the 555 Housing Coop.

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