Symbols used in data flow diagrams Process Data fow Data store External entity A process transforms inputs into outputs, and is represented by a rounded box. Processes are usually described by verbs such as select, purchase, calculate, decide, adjust, hire, and update. A data flow represents movement of data between processes data stores, and external entities. Data flows are represented by arrows, with the data identified along the arrow. A data store is a location where data is stored. It can be a file cabinet, diskette, hard disk, answering machine, or any other place that would be the answer to the question "Where is the data?" The symbol for a data store is an open rectangle An external entity is any person or organization that provides data to a process in the system or receives data from a process. The symbol for an external entity is a square
make a DFD for the sales order management system. (NOTE: refer to the pic)
A Sales order management system is an
Describe their responsibility and liability to the system. Example: (1) a cashier posting orders and collecting payments and giving changes will have to responsible for likely shortage in collections;
Accountabilities: Define the accountabilities associated with IS ownership. Specify who is accountable for project success, adherence to timelines, and achieving business objectives.
Ownership Structure: Define the ownership structure, including primary stakeholders and decision-makers. Clarify roles such as project sponsors, project managers, and key business leaders who own different aspects of the IS.
Address succession planning for key roles associated with IS ownership - Define how responsibilities will be transitioned in case of changes in personnel.
Provide a transparent picture of the development approach, whether it is customized in-house or outsourced to external partners. This information is crucial for stakeholders to understand the dynamic of the development process and the collaborative efforts involved.
Servers: Workstations and End-user devices; networking equipment; storage, Backup and recovery systems; security hardware; Data management and storage solutions
Integration strategies is crucial for providing a comprehensive understanding of how the new system will be incorporated into the existing environment. Each integration approach has its own advantages and challenges, and selecting the most suitable approach depends on factors such as the complexity of the system, the level of risk the organization is willing to tolerate, and the business requirements.
Budget considerations for short-term and medium-term implementation phases. Allocating resources based on the priority of upcoming projects and initiatives.
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