Analyzing Systems Using Data Flow Diagrams

2. Draw a system diagram showing the processes and information flows (and product flow) between WGD and Fast-Fit starting when Fast-Fit places an order until payment is made. This diagram will have two processes/systems (circles in the diagram) and five arrows/flows with the labels on the arrows. Put Fast Fit on the left and WGD on the right.

Sequential file organizations access data sequentially from the beginning [1], i.e. to reach file 27, the 26 preceding files must be accessed first. They are much slower to access compared to random access [1]. Sequential files are stored on a sequential access device [2]. The records contained in sequential files are stored in a predetermined order [2], according to the value of a search key [1], and are stored one after the other [2] as they are inserted into the file. Records can only be accessed (read from and written to) sequentially (i.e. in the same order that they were entered) [3]. Sequential files are designed for efficient processing [1]). Records stored in sequential files cannot be deleted,

I have learned many from the introduction Flowcharting written by (Streib Bill), “Flowcharting is a detailed graphical representation of a process or procedure”.

Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e. workflows). Activity diagrams show the overall flow of control.

As the information system is designed, implementation decisions describing how the system will work are made. Data flow diagrams offer those implementation details, including data stores that refer to files and database tables, programs and human actions that perform processes. The automated parts of the system are differentiated from the manual parts by the human-machine boundary (Dennis, Wixom,

The Rectangular shapes in Black represent the internal job of the Program at a particular section or point

A ____________________ typically includes a data flow diagram to describe the flow of information for a

However, flowchart is capable of showing the overall flow of instructions from one process to another and even files and devices involved in the process. We can see the individual processes just at a glance (like the number of decision making operations). In terms of a conceptual model, it is easier to show iteration (loops) and conditional statements using flowchart, which in case of pseudocode, can easily be as complex as the program code. Furthermore, flowcharts follow a standard format which makes it easy to explain to other programmers (Heathcote, 2000).

Doris opted FLOW CHARTS are best method for transformation in system. She states that before drawing flowcharts one must have blue prints and clear goals of charts in regards of 1) what is it? 2) Why is it used 3) when is it used? 4) What does it look like? According to her view a process flowchart is always chronologically correct, mathematically accurate and simply artistic. She details the flowchart showing quality improvement in MD Anderson by STEEP

Implementing Decision support system (DSS) can benefit greatly in a business and strengthen the bond to its customers and its employees. For instance, Kudler would benefit greatly with the usage of a DSS to its advertisement team because allowing what-if analysis could grow the business remarkably.

c) how individual records can be accessed and how long it takes to access them.

Data flow is basically to ensure the hospitals staff has the information to preform different functions. Things like order entry, charge capture and/or billing. Charge Capture is a 4 step process for the hospital to get reimbursed for the care that was

This diagram is used to break down wide sorts of data and information into increasing levels of detailed. It maps

Data Flow Modelling – This is the process of modelling and recording how data flows around a system. A Data Flow Model is made up of connected Data Flow Diagrams (DFD) which are supported by appropriate documentation. DFDs represent the processes and functions within a system (activates that transform data from one form to another), data stores (file storage, external entities (things that send data into a system or receive data from a system) and finally data flows (show the flow of data around the system).

The interview session has been done by include an open-ended and closed-ended question which are related to the implemented project. Next, sampling technique is executed by system analyst who does evaluation to the current system or prototype. These processes give feedback in evaluation form that filled after tested the system. Lastly, observation is performed by using questionnaire form. According to Burch (1992), the questionnaire is analyzed and transform into structured form that easy to understand. After all information has been collected, structuring of system requirement takes place. It focused on development process modeling which perform “graphically representing the process, or actions, that capture, manipulate, store, and distribute data between a system and environment” (Hoffer, George, & Valacich, 2012, p. 182). In this step, Data flow diagram (DFD) is structured by system analyst using special tools and techniques to create a decision table. According to Hoffer, George and Valacich (2012), decision table is a “diagram of process logic where the logic is reasonably complicated” (p. 200). This table is useful to help system analyst to make a decision toward the project. Then all information’s gained from this phase are documented in System Analysis Report (SAR) that acts as a guideline or reference to the future system development project (Burch, 1992).