working on RetirementCalculatorModel

git-svn-id: svn://anubis/gvsu@428 45c1a28c-8058-47b2-ae61-ca45b979098e

cs623/notes.txt

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+Chapter 1
+1. Computing Environments
+  - physical (amt. of lighting, proximity of co-workers)
+  - social (ex. don't embarass user w/ auditory error message)
+  - cognitive (difference in skill)
+    - background (tech. degree)
+    - stress
+2. Five W's and H
+  - What / How
+  - Where / When
+  - Who / Why
+
+Chapter 8.1 - Usability
+1. Ease of Learning
+  - def: how long it takes for a user to be able to complete certain tasks in the time that would take an expert to do the same
+  - easier to learn => less cost in training process
+2. Efficiency of Use
+  - how many tasks per unit of time a user can perform
+3. Memorability - User Retention Over Time
+  - users ability to use the system after having not used it for a while without having to learn it again
+4. Error Rate / Frequency & Severity
+  - to accomplish objectives with as few errors as possible
+  - recoverable if any
+  - no catastrophic errors
+5. Subjective Satisfaction
+
+Chapter 2.1 - Interaction Frameworks
+1. Don Norman's Model
+  - execution / evalutation
+  -                   1. Goals
+         execution      /     \       evaluation
+                       /       \
+    2. forming intention     7. evaluating interpretation
+    3. specify actions       6. interpreting perception
+    4. executing actions     5. perceiving world state
+                     \           /
+                      \         /
+                       The World
+  1) The gulf of execution
+    - what the user intends != what the system allows
+  2) The gulf of evaluation
+    - what the system presents != what the user expects
+
+Chapter 2.3 - Interaction Styles
+1. Command Language
+2. Menu selection
+  - recognition - not recall
+  - types:
+    - push down
+    - pop up
+    - look ahead
+  - menus for long lists
+    - fisheye (OSX launch bar)
+    - scrolling
+    - 2D menu
+3. Form fill-in
+4. Question and Answer ("Wizard")
+5. Direct Manipulation ("point and select")
+  - visual representation of domain objects
+  - direct action on objects
+  - immediate and visible effects
+  - reversable actions
+6. Metaphors
+7. Natural Language

cs623/proj1/RetirementCalculatorModel.java

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+
+import java.util.*;
+
+public class RetirementCalculatorModel
+{
+    /* input fields */
+    private double myIncomeWanted;
+    private double myEmployerPension;
+    private double myPartTimeIncome;
+    private double myOtherIncome;
+    private double myAge;
+    private double myRetirementAge;
+    private double mySavings;
+
+    /* calculated fields */
+    private double mySocialSecurity;
+    private double myRetirementIncome;
+
+    public RetirementCalculatorModel()
+    {
+        reset();
+    }
+
+    public void reset()
+    {
+        myIncomeWanted = 0;
+        myEmployerPension = 0;
+        myPartTimeIncome = 0;
+        myOtherIncome = 0;
+        myAge = 30;
+        myRetirementAge = 65;
+    }
+
+    public void calculate()
+    {
+    }
+
+    private double calculateRetirementFactor()
+    {
+    }
+    
+    private double calculateSocialSecurity()
+    {
+    }
+
+    private double calculateSavingsFactor()
+    {
+    }
+}