---SAD1 Assignment # 11---

Supposing I am an analyst hired by the IC-dean, I was asked to evaluate the enrollment system of the university. Before evaluating the system, I have to understand the enrollment process first. The university’s enrolment process includes advisement, registration and payment of fees. Each college prescribes a set of requirements in the different course offered by them provided that is duly approved by the university president.

The university has its own enrolment system. From my own observations, some university residents, be it a staff, faculty and especially the students, are not satisfied with the said system. They have complaints such as the long line and the time wasted or consumed in complying just a single requirement. It is not that effective compared to the other university who could cater hundreds of enrollees by just a day. Because if it is, a student be enrolled in a day without that hassle and hypertension feelings. Sometimes, developers of the system think that they already did the things required in their system. Only that they find out that their clients are not that satisfied. The success of the system also depends upon the environment on which it is being deployed.

Thus, here is the brief list and description of the characteristics we have to examine when choosing or defining the deployment environment of the system.

1. Location type or area type of probable deployment environment

The type of location should certainly be examined. A system could not just be deployed on any type of environment it should be an area wherein you can place computer units and possibly have network connections and is well-ventilated as well.

2. Identify available resources

Precedent resources could still be utilized for the system. Available resources should be considered for a deployment environment to be utilized upon deployment.

3. Site possible threat

Risks could never be avoided upon deployment of the system so an analyst should consider identifying possible risk to take place in the future just like bugs of power failure that could affect the performance of the system.

4. Existing systems

External or other existing systems in the deployment environment should be examined so the new system could conform to the external one for better performance.

5. Compatibility with system requirements and among hardware and system software

System requirement, computer hardware and system software configuration should also be considered so that the system could properly function as well as network link and development tools.

References:

http://publib.boulder.ibm.com/infocenter/dmndhelp/v7r0mx/index.jsp?topic=/com.ibm.websphere.wps.doc/doc/tpln_implementnd.html

---SAD2 Assignment # 10---

With reference to assignments 8 and 9, what characteristics does an analyst(you) examine when evaluating DFD quality?

Before discussing the important characteristics a data flow diagram (DFD) must have, let us first understand the concept of the diagram. As the name suggests, data flow diagram is a description of the data with respect to the processes performed in a system. It shows the permanent storage of such data and its transformation into the system.

Data flow analysis tracks the flow of data through business processes and determines how organization objectives are met. It studies the use of data in each activity and documents the findings in data flow diagrams, graphically showing the relation between processes and data.

There are two types of data flow diagrams and one of these diagrams is physical data flow diagram, let us discuss physical dfd.

Physical DFD

Using PDFD is desirable for analysts for the following reasons:

1. It is easier to describe the interaction between physical components than to understand the policies used to manage the application. Identifying people, what they do, which documents and forms trigger which activities and what equipment is used in the processing. The movement of people, documents and information between departments and locations is also identified.

2. Physical data flow diagrams are useful for communicating with users. Users relate easily to people, locations and documents as they work with these each day. Users may consider logical DFDs abstract as they do not contain these familiar components, however, with physical DFDs users can quickly identify incorrect or missing steps.

3. Physical DFDs provide a way to validate or verify the user's current view of the system with the way it is actually operating. If there are differences, they will be noted and discussed. It is not unusual to find that what a users thinks is happening differs in an important way from what actually occurs.

Evaluating Data Flow Diagrams for Correctness

A quality DFD should consider correctness as its primary characteristic. Correct DFD indicates that the analyst understand the data flows in the business processes of its clients. Understanding between the clients and the developer is the key factor in producing a good system. And developing a good system starts from its developing particularly in creating diagrams such as the DFD.

It is essential to evaluate all DFDs carefully to determine if they are correct. Errors, omissions and inconsistencies can occur for several reasons, including mistakes in drawing the diagrams. But the presence of what appears to be an error may in fact point out a deficiency in the system or a situation in which users are not aware of how certain processes operate.

Source:http://en.wikipedia.org/wiki/Data_flow_diagram