Difference difference (GAP) between target of system and system condition actually
- problem detection report not really real
- target too ideal.
- Lacking of resource and or attitude
- system measurement less accurate
- target of system that lag
- difference between system idel and temporary system
Problem solving:
- Formulation of system which is walking investigation in detail
- get ideal system consensus
- develop several alternative
- choose best alternative
Target of investigation showing the problem actually happen
CONSTRAINT IN INVESTIGATION SYSTEM
In doing the investigation of some constraint which often appear is:
- time
- cost
- science
- Political
- Interference
result from investigation a containing recommendation for examples :
• doesn't take steps anything is not found problem
• do system maintenance little problems
• Improving ability or skill of user
• Considering system modification totally
• Placing problem that happened into system development plan which is immediately done
TACTICS OF INVESTIGATION
Why need tactics ? :
• find all problems
• Knowing cause of appearance ofi problem
• determine correct solution
Is done so that all system element can accept offer of solution without bothering their activity
DESKRIPSI SYSTEM IN THIS TIME
- Input
- Output
- File
- Data element
- Volume Transaction and action document
- Data flow chart
ANALYSIS NEED
Intensive interaction phase between system analyst with user end where system development team show its membership to get comments and trust of user so that get good participation
4 TARGET OF WHICH WISH TO BE REACHED
- Explaining system completely
- Depicting ideal information system
- Bringing ideal information system to condition in this time by paying attention resource constraint
- Giving motivation to confidence of user into system development
METHOD
- question and answer
- kuisioner
- observation
- analysis procedure
- document observation
CONSTRAINT RESOURCE
- Time
- Money
- Membership
- Technological
- external factor
DOCUMENT REQUIREMENT OF ANALYSIS
- Analysis instruction : Relation with final user, perception of process, problem of data collecting
- Requirement of User : Requirement in fact, Requirement of report, requirement of training and influence of new system
- Constraint System : Explaining time constraint and expense, membership, technological and factor of eksternal
- Document in the form of data collecting instrument, statistical consensus, data stream by logikal and physical, data element early in data dictionary
GENERATING SYSTEMS ALTERNATIVES
How to draw near the condition of system in this time with condition of ideal system?
Choice Strategy
- Distributed Versus processing centralized
Change of decision of information of data centralized of processing to center responsibility user end decentralized
- Versus database dispersed Integrated
Designer of system have to consider data any kind of which enter in data base and which come into File
- Surround Strategy System Development of
Environmental about important strategy in the case of confiscation because information system of other company possible differ from company in this time
- Choice Tactics
Done before choice scheme of operational
- Choice Scheme of Operational
Choice Scheme can be grouped into
Input
- Online Vs Off Lino Data Entry
- Keyed Vs Machine Readable Data Entry
- Centralized Vs Decentralized Data Entry
Processing
- Batch of Vs Realtime update record
- Sequential Vs Direct Access records to
- Single Vs Multiple User update records of
Output
- Traditional Vs Turn Around Documents
- Structured Vs Inquiry reports based
SELECTING THE PROPER SYSTEM
Tactics compare : System compared to pursuant to advantage and expense relatively; There is 3 way of system of A told by more pre-eminent with other system if:
- A have lower expense of B and advantage both is same
- A have lower expense of B and of A yield advantage which more than B
- A and of B have same expense but yielded by advantage is A more.
Some Method of Komparasi System
- Break Even Analyisis point
- Payback Period
- Discounted Payback period
- Internal Rate Of Return
SELECTING THE PROPER SYSTEM
- katagori cost
- hardware
- software
- people
- suppliers
- teleccommunications
- physical sites
Comparing the expense of information system pass life of system, projection analyst how much change of expense for the future and there is 3 model of is expense of information system that is Linear, Eksponensial and of Step Function
Expense of information system earn just happened once and earn also happened chronically.
Expense of just information system that happened once that is cost ontime and of development cost that happened system development moment.
Expense of information system that happened continually among others is cost reccuring and also cost operational where this expense happened information system moment operate every day.
FACTOR INFORMATION SYSTEM.
Factor Qualitative which is good information system performance flange among others
- Lessening mistake storey level
- Lessening time to improve;repair mistake
- Lessening time listen carefully from alternative workstation
- Quickening ready time of information
- Improving system security
- Multiply update of source of active record
- Improving satisfaction of user.
FACTOR STRATEGY COMPANY
- Satisfaction of consumer
- Mount sale mount
- Consumer Komitmen and of vendor
- Information product marketing
PRESENTING STUDY OF SYSTEM.
- Doing presentation in a word
- Lessening clarification of technique in detail
- Mempretasikan clearly by means of ... assist visually
- If using model use appliance assist for example laptop so that more informative
- Emphasizing advantage of information system proposal with a few existing alternative according to condition of natural by company.
DECISION CONTINUE OR NOT
- if company set mind on to develop system hence information department will process hereinafter that is Process of Desain System.
- If on the contrary hence System Development Life Cycle ( SDLC) will be discontinued
- Frequently will be found the problem of with study system and and usually management top will ask doing of reworking to study system
- Model will explain repeated step some part and sometime information department will make decision to repeat step before explaining study system
- With alternative, decision to repeat a step of SDLC not to speak of or previous Go – No – Go Decision
