Beginning Observation, Requirement Analysis

Concept Investigation System

1. Difference of between the target of system and conditon of system actually.
2. The problem detection the report is not real true:
- Purpose too ideal
- Deficit the resource and attitude.
- Measurement the system less accurate.
- Purpose of the system that lag.
- Difference between ideal system and temporary system
3. Problem Solving
- The Spelling of system was out that is walking  the investigation in detail.
- Get the ideal system consensus.
- Develop the several alternative.
- Choose the best alternative.
4. Purpose the investigation
- Show the problem actually happen

Obstacle in the Investigation System

In the investigation, many obstacle can be to appear:
- Time
- Cost
- Science
- Policies
- Mix hand

Recomendation

The result of investigation is a recomendation containing about:
- Doesn’t take the step to whatever  not found the problem
- The system maintenance  small problem
- Increase ability or user craft
- Considering the system modification according to total
- Laid the problem that happened in to the paln of system development can be done

Tactics of Investigation

1. Why need the tactics?
- Find all problem
- Detect the appearance problem
- Determine the corret solution
2. Be done so that all system elements can get solution tender without disturb their activity.
3. Some tactics can be conducted:
- Listen the opinion from system executant
- Don’t give begining solution
- Compare the story from the system executant toward the same of the case
- Look at the problem of inkonsistensi logikal
4. Direct:
- Kuesioner
- Question and answare
- Observation
5. Not direct:
- Procedure current
- Study the document
- Sample
- Tabular

Description of System in this time

- Input
- Output
- Files
- Data Elements
- Transaction volume and action of document
- Data flow chart

Requirement Analys

Intensive interaction phase between system analys by with and user where team of system development show it’s membership to get the response and wearer belived so that get the good participation.

1. Four target want to achieved:
- Explain the system to entirety
- Describe the system information to ideal
- Bring the ideal of system information to the condition this time with attention the obstacle of resource
- Give push to confidence the user in the system development

2. Method
- Question and answer
- Kuesioner
- Observation
- Analys procedure
- Document observation

3. Obstacle of resource
- Time
- Money
- Skill
- Technology
- External factor

4. Document need the analys
- Analys directive : the connection with user ends, process observation, troubleshoot in data collecting
- Requirement user : requirement actually, requirement report, requirement training, and influence the old system
- System obstacle : explain the time and cost obstacle, skill, technology, and external factor.
- Document shaped the instrument of data collecting, statistics consensus, data current according to logikal and physical, the first data element in the data dictionary

Generating Systems Alternatives

How does manner nearing the condition of system in this time with the ideal system condition?
- Make the alternative for break the problem of system information
- The best alternative can be appliened wisely

Strategy choice:
- Distributed versus centralized processing
Change the information decision from centralized data processing to decentralized end user responsibility center.
- Integrated versus dispersed database
Planning the system must considering the data everything that come in the data base and come in the file.
- Surround Strategy of System Development
Around of environment important strategy in the expropriation matter the company because the system information from company other may be differ with company in this time.

Tactics choice
Done before choice the operational planning.

Choice the operational planning
Planning can be grouped in to:
- Input
a. Online Vs Off Line Data Entry
b. Keyed Vs Machine Readable Data Entry
c. Centralized Vs Decentralized Data Entry
- Processing
a. Batch Vs Realtime record update
b. Sequential Vs Direct Access to records
c. Single Vs Multiple User update of records
- Output
a. Traditional Vs Turn Around Documents
b. Structured Vs Inquiry based reports

Selecting The Proper System

Tactics compares : the system compared based on cost and profit according to relative. There 3 manners A system said superiorer with other system if:
- A have a cost lower from in B and the profit both same
- A have a cost lower from in B and A produce profit more than B
- A and B have same the cost but profit that produced a more many

Many method of System Comparation:
- Break Even point Analyisis
- Payback Period
- Discounted PayBack period
- Internal Rate of Return

Cost category:
- Hardware
- Software
- People
- Suppliers
- Teleccommunications
- Physical sites

Cost details
Compare the cost of system information pass system life, the analys of how much expense change for the future and there is 3 model of expanse information system that is a linear, exponential and step function.

Cost of system information can be happen once and can be happen according to chronically.
- Cost of system information that happened once is ontime cost and development cost happened at system development.
- Cost of system information that happened continually among other things is reccuring cost also operational cost of where this expense is happened by the moment of information system operate every day.

Factor of System Information

Qualitative factor instructing good information of system performance
- Decrease error level
- Decrease time to repair error
- Decrease time listen carefully from workstation alternative
- Quickening ready time of information
- Improving system security
- Multiply to update the active source record
- Improving wearer satisfaction

Factor of company strategy
- Consumer satisfaction
- Sale level increases
- Consumer commitment and vendor
- Information of product marketing

Presenting System Study

- Conducting presentation in a word
- Lessening technique clarification in detail
- Presenting clearly with the visual assistive appliance
- If using model use the assistive appliance for example laptop so that more informative
- Emphasizing advantage from proposal of information system with a few existing alternative according to natural by condition of company

Decision Continue or Not

- If company set mind on to develop the system hence information department will do the process hereinafter that is Process the Desain System
- If on the contrary hence System Development Life Cycle ( SDLC) will be discontinued
- Frequently will be found problem with the study system and and usually top management will ask conducting of reworking to study system
- Model will explain the some part of step repeated and sometime information department will make decision to repeat the step of before explaining study system
- With the alternative, decision to repeat a not to speak of or previous step SDLC of Go – No – Go Decision