namayana

• not neat in old ones system causess old ones system doesn't operate well. not neat can be in the form of
  

• intentional deceits that causes not wealth treasure the safe companies and data truth soes less well guaranted,
  

• not the efficient operation,
  

• not bidding management policy that appointed.
  

• organization growth information need more vaster, data volume more increase, bew accountancy principle change. causes old ones system becoming not effective.

• to reaches to chances (opportunities) because the increasing of ready information and make use to chance existing, for example market opportunities, service that increase to customer and other as it
  

• instructions existence (directives) bew system composers happen instructions from on leadership and or from outside organization likes government regulation for example

organization’s expectations after implementing an information system

• performance enhanced towards bew system performance so that be effectiveer.
  

• information enhanced towards information quality that presented
  

• economy enhanced towards benefit or profit or decreasing cost that.
  

• control enhanced towards control to detect and will repair error with deceit that will happen
  

• eficiency enhanced towards efesiansi operation

• services service enhanced towards service that given by system
  

principles of developing an information system

• system that developed management after system finished developed, so that use information system from system management, so that system must can support need by management
  

• system that developed big capital investment. in information system development needs capital investment very big, so every capital investment must considering 2 matters.
  

- all alternative existing must investigation.

- best investment must valuable

• system that developed to need one who educated

• work stage and duties that must be done in course of system development
  

• system development process must not be straightened
  

• don't be afraid cancel project

• documentation must there for guide in system development.

System development life cyclelopmen

waterfall model

first be be done in model waterfall requerments having taken ste requerment so design a information system care of mengemplemtasi into a organization then verification what that system walk well afterwards good system must always be cared

iteratif model

in model iteratif this us must make planning and then do requirement that having taken ste then makes design and that having taken ste the analysis is then does test having taken ste test we return to beginning to repair matter less in antecedent information system

spiral model

approaches of developing a system

Ø will approach classic opponent will approach structured will approach this will emphasized that system development

success when follow stage at system life cycle.

Ø classic approach in system development that follow stages at system life cycle without supplied with

tools and techniques memadai.

Ø structured approach this that begun from beginning year 1970 called with approach structured. approach structured equiped with to

ols and techniques that wanted in system development so that end result from system that developed be got

system so that end result from system the structure will be be defined well and clear.

Ø approach pieces opponent approaches system. approach pieces be to approach system

development that emphasized at one particular activity or certain application.

approach system that pay attention information system as one integration unitary to each activity or the application.

Ø approach botton-up opponent approaches top-down

approach botton-up begun from level under organization, that is level where is transaction done. approach this begun from needs

formulation to handle transaction and climb level on with formulate information need based on transaction.

approach top-down on the contrary begun from level on organization, that is level strategy planning.

approach this begun with define target and organization policy.

Ø approach system comprehensive opponent approaches

approach system - comprehensive be to approach menyang system together according to comprehensive. will approach this less

synchronized for system complex because difficult to be developed. this be to approach classic approach moduler

try memecah complex system therefore some part or simple module, so that system easier will be

understood and developed.

Ø approach great loop opponent approaches to bloom.

approach to great loop apply change according to together use sophisticated technology. this change is many

contains risk, because computer technology so fast bloom and to year coming be worn out.

approach this too expensive, because need investment at the same moment.

methodology is method's unitary, procedures, job concepts, rules and postulates that used by a art science or discipline the other. while method a manner, systematic technique to does a certain. sequences procedure for this trouble-shooting is known with algorithm term