QUIZ 4

INITIAL INVESTIGATION AND ANALYSIS REQUIREMENT

INVESTIGATION SYSTEM CONCEPTS

The gap between system purposes and the condition actual system.
The report of detection problem is not real or actual.

a. A purposes that too ideal.
b. less of resources and attitude.
c. less acurate is measuremen system.
d. the purposes system that is out of date.
e. difference between idel system and temporary system.

Problem solving:

a. An Acurate the inverstigation.
b. Ideal Getting of system consensus.
c. Developed several alternative.
d. Select the best alternative.

Purpose of investigation indicate problem are happen in the system.


CONSTRAINT IN INVESTIGATION SYSTEM

Problem are often appear in system investigation:
- Time
- Cost
- Knowledge
- Politic
- Intervention


INVESTIGATION TACTICS

Why need tactics ?
- Find all the problem.

- Knowing cause of problem.

- Determine correct solution.

several tactics which can be conducted:

- heard opinion from system subject.

- Consideration some opinion from system agent about the same problem.

- Paying notice to problem of inkonsistensi logical.




INVESTIGATION TECHNIQUE

Technique directly (Internal):

- The questionnaire

- Discussion

- Monitoring

Technique Indirectly (External):

- Flow of the procedure

- Reviewing documents

- Sample

- Tabular

Current system Description

- Inputs

- Outputs

- Files

- Data elements

- Transaction and document action volume

- Data Flow Diagram


REQUIREMENT ANALYSE

Intensive Interaction stage between system analyst by end is user of where team of system development indicate for get faith user.


4 Purpose which wish reached

- Explaining the system completely.
- Describing ideal the information system.
- Giving provide about make the user trusting into system development
- Bringing ideal information system to condition in this time by paying attention to resource constraint


Method

- Discussion
- Questionnaire
- Observation
- Analyse procedure
- Document Observe


Resource constaraint
- Time
- Money
- Membership
- Technological
- Eksternal Factor




The Requirement Document Analyse


1. Instruction analyse
Relationships with end users, the observation process, problems in data collection.

2. The user needs
The need actual, reporting requirements, training needs and the influence of the new system

3. System Constraint
Explain the constraints of time and cost, expertise, membership, technological and factor eksternal
4. Document in the form of data collecting instrument, statistical consensus, the logical flow of data phisical.



GENERATING SYSTEMS ALTERNATIVES

How method near condition of the current system with the condition of the ideal system?

- Creating an alternative for analyze the problem of information system

1. Best alternative is applied wise.


- Options Strategies

1. Distributed versus centralized processing
Change in centralized data processing to decentralized end user responsibility center

2. Integrated versus dispersed database.

3. Surround Strategy of System Development


- Options Tactics
Before behavior to design operational

- Designing Operational Options
Selection in design operational can be group:

a. Input
1. Online Vs Off Line Data Entry
2. Keyed Vs Machine Readable Data Entry
3. Centralized Vs Decentralized Data Entry
b. Processing
1. Batch Vs Realtime record update
2. Sequential Vs Direct Access to records
3. Single Vs Multiple User update of records
c. Output
1. Traditional Vs Turn Around Documents
2. Structured Vs Inquiry based reports


- SELECTING THE PROPER SYSTEM

There are 3 method the system "A" said the system more superior with other system if :

a. A has a cost lower than B and their profit equal.
b. A has a cost lower than B and A result in more profits from the B
c. A and B have the same costs but the result benefit A more.

Several Method of Compare System

- Break Even point Analyisis
- Payback Period
- Discounted Payback period
- Internal of Rate Of Return

Categories Cost :
- Hardware.
- Software.
- People.
- Suppliers.
- Telecommunications.
- Physical sites


Categories details


Comparing the cost of information systems through the life of the system, projection analyst of how many expense change for the future and there is 3 model of expense of information system that is Linear, Eksponencial And Step Function

Information system cost happen in one time and be able happen continuous.

- Cost of just information system that happened once that is ontime cost and development cost that happened system development moment .

- Cost of information system that happened continually among other things is reccuring cost and also operational cost of where this expense is happened by the moment of information system operate every day.



The Information System Factor

Qualitative factors that lead the performance information system that both of them:

a. Reducing mistake storey
b. Reducing the time to fix errors
c. Reduce the response time from the workstation alternative
d. Accelerate the time of providing information
e. Improve security systems
f. Multiply to update the active source record
g. Improving user satisfaction


Company Strategy Factor

a. Customer satisfaction
b. Sales increased
c. Consumer and vendor commitment
d. Product marketing Information

Representation Learning System

- Make short in time presentations
- Reduce the technique clarification in detail
- Presenting clearly by means of assist visual
- If using a model using a tool such as a laptop so that more informative
- Emphasize the advatage of the proposed system with some alternative information that is appropriate conditions experienced by the company.


Decision to continue or No

- If the company decide to developing the system so information department will go to next process that is design system process.
- If contrast from above so System development Life Cycle will be stopped.
- Often the problem will be found in study system and the top management ask to re-working to study system.
- Model will explain some part of stage which is repeated and sometimes information department will make a decision before explain the system study.
- With the alternative, the decision to repeat SLDC stage before or not called Go - No-Go Decision.