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Lecture 12

IS 3003 Lecture 12: Notes - Building Information Systems
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by OneClass1109422 , Fall 2015
3 Pages
75 Views
Fall 2015

Department
IS - Information Systems
Course Code
IS 3003
Professor
Nasim Talebi
Lecture
12

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IS3003
Building Information Systems
Chapter 12
DIFFERENT WAYS OF DEVELOPING INFORMATION SYSTEMS
1. PROBLEM SOLVING AND SYSTEMS DEVELOPMENT
a. ISasSolutionstoProblems
i. 4stepstobuildingandIS
1. Defineandunderstandproblem
2. Developalternativesolutions
3. Choosesolution
4. Implementthatsolution
ii. Thefirst3stepsaresystemanalysis
iii. Thelaststep(implementingthesolution)issystemsdesign
b. SystemDevelopment(ProblemSolvingApproach)
i. Step1:DefiningandUnderstandingtheproblem
1. Whatcausedtheproblems
2. Whydoesitpersist?
3. Whyhasn'titbeensolved?
4. Whataretheobjectivesofasolution?
5. ConductaRequirementAnalysistodeterminetheInformation
Requirementsofthenewsystem.
ThemoretimeandmoneyspentonStep1,themorelikely
youaretobesatisfiedandgettheresultsyouwant.
ii. Step2:DevelopAlternativeSolutions
1. Developalternativesolutionstoachievetheobjectivesand
InformationRequirementsthatwereidentified
2. Somesolutionsdonotrequireaninformationsystem
3. Somesolutionsrequiremodificationofexistingsystems
4. Somesolutionsrequireanewsystem.
iii. Step3:EvaluatingandChoosingSolutions
1. ConductaFeasibilityStudytodeterminewhethereachalternativeis
feasibleandachievable
Isthesolutionfeasiblefromfinancial,technical,and
organizationalstandpoint?
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Description
IS3003 BuildingInformationSystems Chapter 12 DIFFERENT WAYS OF DEVELOPING INFORMATION SYSTEMS 1. PROBLEM SOLVING AND SYSTEMS DEVELOPMENT a. IS as Solutions to Problems  i. 4 steps to building and IS  1. Define and understand problem  2. Develop alternative solutions  3. Choose solution  4. Implement that solution  ii. The first 3 steps are ​system analysis  iii. The last step (implementing the solution) is ​systems design  b. System Development (Problem Solving Approach)  i. Step 1: Defining and Understanding the problem  1. What caused the problems  2. Why does it persist?  3. Why hasn't it been solved?  4. What are the objectives of a solution?  5. Conduct a Requirement Analysis to determine the ​Information  Requirements​ of the new system.  ○ The more time and money spent on Step 1, the more likely  you are to be satisfied and get the results you want.  ii. Step 2: Develop Alternative Solutions  1. Develop alternative solutions to achieve the objectives and  Information Requirements​ that were identified  2. Some solutions do not require an information system  3. Some solutions require modification of existing systems  4. Some solutions require a new system.  iii. Step 3: Evaluating and Choosing Solutions  1. Conduct a ​Feasibility Study​ to determine whether each alternative is  feasible and achievable  ○ Is the solution feasible from financial, technical, and  organizational standpoint?  1 2. Design a​ systems proposal report­ ​Describes, for each alternative  solution:  ○ Costs and benefits  ○ Advantages and disadvantages  iv. Step 4: Implementing the Solution  1. Systems design stage:​ Systems design is the detailed design, model or  blueprint for the system  ○ This includes:  i. Hardware selection and acquisition  ii. Software development and programming  iii. Testing  iv. Training and documentation  v. Conversion  vi. Production and Maintenance  vii. Managing the Change  2. Training and Documentation  ○ Training:​ For successful implementation to occur, users will  require training so they will be able to use the new system.  Different types of training are available: online, face to face,  built in help features, etc  ○ Documentation:​ Shows how the system works from both a 
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