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To access the contents, click the chapter and section titles.
Wireless Networking Handbook
Also, if the manager will be a user of the system, be sure to ask the questions for users. Reviewing System DocumentationWhen determining requirements, the project team should review current documentation that provides an accurate description of existing systems. For instance, review the concept of operations to examine system-level functionality, operational environment, and implementation priorities for an organizations information system. Also, review the strategic information system plan, which provides a long-term vision and the general procedures necessary to manage the efficient evolution of the corporate information system. This review provides policies and standards the design team may need to follow. In addition, the organization may have other plans, such as business and employee projections, that the team can consider. Business plans describe the future markets and strategies the company wishes to pursue and are useful when determining the types of applications and services the users might require. Reviewing the EnvironmentTo determine environmental requirements, consider the conditions in which the network will operate. Gather information by interviewing the companys facility manager and visually inspecting the area. Here are questions you will need to answer for wireless network implementations:
The obvious unseen hindrance to a radio-based wireless network is interference. Thus, in addition to talking with the facility manager about potential interference, consider using a radio-based site survey tool to evaluate radio wave activity within the part of the radio spectrum your components will operate. Most wireless LAN vendors include these site survey tools with their products. You can use a spectrum analyzer to measure the amplitude of signals at various frequencies. If your project also includes wired network components and systems, perform the following activities to determine environmental requirements:
Defining RequirementsAfter gathering information, youre ready to define the requirements that will provide the basis for the design. To define the requirements, perform these steps:
Determining Potential RequirementsThe first step in defining requirements is to identify potential requirements by using the information gathered during interviews, review of documents, and inspections. You can accomplish this by:
Conducting a Joint Application Design MeetingAn effective method for drafting requirements is to conduct a series of team meetings using Joint Application Design (JAD) techniques. With JAD, all the active participants work together in the creation of requirements. As illustrated in figure 6.3, JAD is a parallel process, simultaneously defining requirements in the eyes of the customer, users, sales, marketing, project managers, analysts, and engineers. You can utilize the members of this team to define requirements.
The goal of JAD is to reach a consensus on requirements among all team members, especially the customer and developers. JAD ensures the early definition of accurate requirements, minimizing later rework. JAD is extremely effective for defining requirements because the customer becomes a partner in the development project, allowing an effective customer-developer team, which breaks down communications barriers and increases levels of trust and confidence. Because JAD helps you to determine requirements quickly, developers can start prototyping earlier. Prototyping is important because it provides a vision of the system for the users, fueling the refinement of requirements. JAD also keeps the customer accurately informed on what can and cant be done because engineers can validate the requirements as the customer states them.
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