FIRST OBSERVATION, NEEDS ANALYSIS

INVESTIGATION SYSTEM CONCEPT

· Gap difference between the purpose of the system and actual system conditions

· Reports detection problem is not really real

§ Too ideal destination

§ Lack of resources and attitudes

§ Measurement system is less accurate

§ System that is the goal behind

The difference between the ideal system and the while system

· Problem solving:

§ investigation system that is running à investigation in detail

§ Getting a consensus that the ideal system

§ Developed several alternative

§ Selecting the best alternative

Destination of investigation à indicates the problem is actually happening

CONSTRAINTS IN SYSTEM INVESTIGATION

· Several problems that often appear are:

§ Time

§ Cost

§ Science

§ Politics

§ Intervention

RECOMMENDATIONS

· Results of the investigation is a recommendation that includes are:

§ Not to take any action à not found a problem à

§ Perform system maintenance à problems that small

§ Increasing the user ability or skills

§ Consider modifications to total system

§ Putting the problem to occur in the development plan system which immediately made

INVESTIGATION TACTICS

· Why we need tactics?

§ Find all problems

§ Knowing the causes of problems

§ Determine the appropriate solution

· Done so that all elements of the system can receive preferred solution without disrupting their activities

· Some of the tactics that can be done:

§ Listen to opinions of the performer system

§ Do not give the early breakthrough

§ Compare the stories of some of the performer system on the same cases

§ Note the logical inconsistency problem

INVESTIGATION TECHNICAL

· Direct:

§ The questionnaire

§ Frequently asked questions

§ Observations

· Not directly:

§ Flow procedure

§ Reviewing documents

§ Sample

§ Tabular

SYSTEM DESCRIPTION

§ Input

§ Output

§ File

§ Element data

§ Transaction volume and document action

§ Data flow diagram

NEEDS ANALYSIS

Stage of intensive interaction between the systems analyst with the end user where the development system team shows the expertise to get feedback and the user trust so get a good participation

· 4 PURPOSE THAT WANT ACHIEVED:

§ Explain the system completely

§ describe the ideal information system

§ Bring the ideal information system to conditions at this time with attention to resource constraints

§ Provide a stimulus to the user confidence in system development

· Method

§ FAQ

§ The questionnaire

§ Observation

§ Procedure analysis

§ Observation document

· RESOURCE CONSTRAINTS

§ Time

§ Money

§ Expertise

§ Technology

§ External factors

· Needs analysis document

§ Analysis guide: Relationships with end users, the observation process, problems in data collection

§ The user needs: The need actual, reporting requirements, training needs and the influence of the new system

§ System constraints: Explaining the cost and time constraints, expertise, technology, and external factors

§ Documents such as data collection instruments, statistical consensus, the logical flow of data and physical, data elements in the initial data dictionary

GENERATING SYSTEMS ALTERNATIVES

How do to approach the condition of the system at this time with the condition of the ideal system?

§ Create an alternative to solve the problem of information system

§ Alternative is best applied wisely

Options Strategies

§ Distributed versus centralized processing

Changes in decision-making of information from the centralized data processing to the end user decentralized responsibility center

§ Integrated versus dispersed database

System designer must consider the data are entered in the data base and the entrance to the file

§ Surround System Development Strategy of

The environmental strategy is important about in the case of company takeovers because the information system of other companies may vary with the company at this time.

SELECTING THE PROPER SYSTEM

· Compare tactics: systems based on the comparison of costs and benefits relative; There are 3 ways said system A system is superior to the other if:

§ A cost is lower than B, and the benefits of both

§ A cost is lower than B and A yield advantage of more than B

§ A and B have the same but the cost advantage generated a lot more.

· Some methods of Comparing System

§ Break Even point Analysis

§ Payback Period

§ Discounted payback period

§ Internal Rate of Return

· Cost categories

§ Hardware

§ Software

§ People

§ Suppliers

§ Telecommunications

§ Physical sites

· Cost details

Comparing the cost of information systems through the life of the system, analyst predict how cost changes for the future and there are 3 models cost information system, namely Linear, and exponentially Step Function

· Cost of information system can occur only once and can also occur on an ongoing basis.

§ Information system costs that occur once only cost that is on time and development costs that occur during the development of the system.

§ Cost information systems that occur on a continual basis are reccuring cost and operational cost where the cost of this is the case when the system information operating every day.

FACTORS INTO INFORMATION SYSTEM

Qualitative factors that head for the good performance of information system that both of them:

§ Reduce errors

§ Reduce the time to fix errors

§ Reducing the response time from the workstation alternative

§ Accelerating the provision of information

§ Increase the security system

§ Have active update source record

§ Increase user satisfaction

FACTORS INTO CORPORATE STRATEGY

§ Customer satisfaction

§ Sales increased

§ Consumer and the vendor’s commitment

§ Information marketing products

PRESENTING LEARNING SYSTEM

§ Make short presentations

§ Reduce the explanation of technical detail

§ Presenting clearly with visual aids

§ If using a model, using a tool such as a laptop so that more informative

§ Emphasize the benefits of the proposed of information system with some that there are alternative suitable conditions experienced by the company.

CONTINUING DECIDE OR NOT

§ If the company decided to develop the information system, the department will do the next process, namely Design System Process.

§ If on the contrary than the System Development Life Cycle (SDLC) will be terminated.

§ Often also will found problems with the system and the study and top management will usually ask for the fulfillment of the re-study system.

§ Model will describe some of the stages of the repeated and sometimes the information will make a decision before the repeat stage system of study.

With the alternative, the decision to repeat a previous phase or SDLC is not Go – No-Go Decision.

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