Pbl session 2 report

PBL SESSION 2
QUESTION 1
The types of feasibility test typically used by the system analyst to evaluate
feasibility of the project. Provide examples of questions that need to be
addressedineachfeasibility tests todetermine whether or not to proceed with
the new inventory system project.
ANSWER :
A feasibility study is an analysis undertaken to determine whether or not a
system request is worthy of further consideration. The general objectives of
feasibility study is to find out if an information system project can be done and to
suggest any possible alternative solution. A feasibility study should provide
management with enough information to decide on whether the project can be
done, whether the final product will benefit its intended users and
organization,what are the alternatives among which solution will be chosen and
also is there a preferred alternatives that can be done. There are four main types
of feasibility study which are technical feasibility, operational feasibility, economic
feasibility and schedule feasibility.
The first types of feasibility study is technical feasibility. A technical
feasibility involves determining whether a proposed information system is
possible given the current state of technology. A project is feasible if the
technology is avaolable and capable of meeting user requirement. This feasibility
concerns with the availibility of suitable equipment and adequacy of the
equipment to satisfy organization needs.

There are many types of question that need to be addressed to determine
whether or not to proceed with the new inventory system project. One of the
example question is are the necessary recources available to proceed. This types
of question are needed because the necessary resources can reflect the
information technology department’s skill and expertise are available to proceed
with the new inventory system project. The other example question are is the
new system are absolutely necessary or not. The new system are necessary for
the growth of the depatments too improve their efficiency and effectiveness of
the activity that are conducted.
The second types of feasibility study are operational feasibility. This
operational feasibility is a function of human resources of the project, which
concern with how the system operate and how users will accept it when the
system are developed and implemented. Operational feasibility covers two
aspects which is technical performance and acceptance of users. Technical
performance determining whether the information system can provide the right
information at the right place and time. While the acceptance of users means
complete acceptance of the new system by the users.
One of the example question in operational feasibbility are whether the
organization is willing to provide training to users and full support from the
management. This is because by provide training to employees can increase their
performance in finishing the task given at the right time and also can increase the
efficiancy and effectiveness in the mangement itself. The next example question
are will the customers be better served or not. A customer is one of the important
person that can evaluate the performance of the management.

For example,If the management receive a negative comment or feedback
from the customer it shows that there are weeknessess that need to be improve
in the management.
Next, economic feasibillity can also be referred to as cost or benefit
analysis. Itinvolves determining whether a proposed information system will yield
benefits its exceed its cost. This can be means that by comparing the costs with
the benefits and savings that are expected from the system. This feasibility
concerns with the return on investments in the new information system of the
management. In order to evaluate the investment is by using an accounting
technique to analyse its cost and benefits such as net present value and the
return on onvestment.
One of the example question are whether the system cost is effective or
not. The management must be able to see the value of the investment it is
pondering before committing to an entire system study. The economic feasibility
will review the expected costs to see if they are in-line with the projected budget
or if the project has an acceptable return on investment so that the cost can be
reduced. By reducing the cost of the existing system, it automatically can increase
the level of satisfaction among the customer and also can increase the level if
efficiency in the sales margin by the way of improve the effeciency in the existing
system.

Last but not least, schedule feasibility is question if there is a specific time
deadline, and if so, can the system be operational before the deadline. The
example of question are whether the new system be implemented in a
reasonable time period or not. The new system can be implemented in a
reasonable time period with the advancement of the technology, and everything
that can be done more easier, cheaper, more accurate and even faster compared
to tasks done manually as in the existing system.

QUESTION 2
The characteristics of quality information system.
ANSWER :
A quality or good information is that which is used and which creates value.
Besides, a quality information system is relevant for its purpose, sufficiently
accurate for its purpose, complete enough for the problem, reliable and targeted
to the right person. For example, the information system that is understandable
to the user.
There are some characteristic that relates to the quality of infromation
system. One of the characteristic are ensure that the new system is better than
the existing system. This can be measure by comparing the new system with the
existing systemwhether the weeknessess in the existing system have been solved
or not. For example, the new system should be tested first in order to make sure
whether the system have already been updated and wheter the weeknessess
have been improved or not.
The next characteristic are the system should be effective. This can be
measured by whether the system are fit between the technology and task and
also the users. For example, before a new system are implemented, the
management should make sure that the system can cooperate well with the
technology and the management can used the new systemin completing their job
effectively. In terms of users, the system are effective when the users are
comfortable with the new system compared to the existing system.can use the
new system more easily, comfortable and simple to understand compared to the
existing system.

The other characteristic are the system should be user friendly. This
characteristic can be measured by the system are easy to use, learn and
understand and also well communicated. For example, the system are called user
friendly when the new system are introduced, the first-time user are able to
adapt on the spot on the new system. Besides, the new system also are
convenient to learn and also the new system are well-documented for both self
references and learning purpose.
An addition, the quality information system is also when the data are
accurate. This can be measured by when the management can prevent from
making wrong in the business decision that resulting to the business loss. This can
be obtained through frequent data entry for each business transactions. For
example, inventory controlsystemuses frequently updated data in terms of price,
quantity of available stocks and also description to ensure the accuracy of the
information system.
Last but not least, the system should be flexible. This can be measured by
when the system are easily maintened. For example, if there is any problems
regarding the new system, the users can and able to overcome the problems as
well as making corrections or redo their task to arrive at the correct answer.

QUESTION 3
The rules for creating process, data store, source/external entity and data flow
symbols in data flow diagram.
ANSWER :
Data flow diagram is the most widely used graphic presentations in the
analysis phase. The data flow diagram is a graphic presentation of external
entities, data movement, processing function and also data stores. there are
certain rules that the users need to flow when doing the data flow diagram in
terms of the symbol used in the data flow diagram.
Firstly and foremost, for the creating process or transformation of data, it
use a symbol of cycle. This symbol of cycle indicates that what a system does
actually and the it should consist of one single process or a specific action. For
example, cash payment cycle. The rules in drawing the symbol of circle is the
name and number should be appear inside the circle. Besides, the name should
be clearly label and can be understandable. In addition, the first word in the
process symbl in the Intermediate and Elementary DFDs must begin with a verb
followed by a descriptive noun.
Next, data store use symbol of parallel line which is refers to where data
are being stored until used by the other parts or process. The process can enter
data into a data store or retrieve data from the data store. Example for data store
such as invoice file. The rules in drawing the data store is the line should be in
parallel and data store symbols should not be appear in the Context DFD.

The next symbol used in data flow diagram is symbol of rectangle that
indicates the external entity. An entity can be a person, department,system or
organization out of system that sent data to or receive data from the system. In
other words, the system interacts with these entities. Example for an external
entity are banks, customer and creditors. The rules in drawing this symbol is the
name should be label correctly.
Last but not least, symbol of an arrow that are used to indicate the flow of
data. An arrow pointing to a data store indicates writing or updating to the data
stores. Besides, an arrow that coming out of the dta stores shows a reading
process. Examples for the flow of data are the completed job order form and
repair or services. The rules in drawing this symbol are the arrow direction for the
data flows must be correct. Besides, the crossing of lines will not be allowed in
this diagram and also the entities and data store can be duplicate where
necessary.

QUESTION3
Five (5) weaknesses found in the existing context level Data Flow Diagram
and suggest how the weaknesses should be corrected.
ANSWER :
WEEKNESSESS CORRECTIVE ACTION
1. The title of the diagram does not
mention the word “context” that
shows the hierarchy used by the
company.
1. The title should be write as
Context Data Flow Diagram on
Inventory System.
2. The arrow are not label that
indicates the flow of data.
2. The arrow should be label
correctly such as Sales order
form.
3. The process should not be
numbered as “1” and write the
word “process”.
3. The name label in the circle
should be writeas Inventory
Systemonly.
4. The arrow pointing to clerk is
wrong.
4. The arrow should be fromthe
clerk to inventory system.
5. Inventory file or data store
symbol should not be appear in
the Context Data Flow.
5. The inventory file should be
deleted and not appear in the
Context Data Flow.
6. The arrow are not straight line. 6. The arrow should be adjusted as
straightline.

Pbl session 2 report

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