1. EXPLORING REQUIREMENTS – QUALITY BEFORE DESIGN Gause & Weinberg - PART IV – CLARIFYING EXPECTATIONS

2. Clarifying Expectations Define these and streamline at every step Functions Attributes Constraints Preferences Expectations

3. Functions Define the functions - what should the product DO to exist for the client? Apply function heuristics - categorize functions into evident, hidden and frill Do this each time you decompose a function into lower-level functions

4. Attributes Characteristics desired for a function Function = durability for an eraser Attributes = absorbing capacity; capacity to not smudge while erasing; not break when dropped Wish list – organize – assign to functions Exclude non-assigned ones

5. Constraints After all functions are defined, attributes are assigned to functions & classified… See if attributes are implemented….how? If all its constraints are satisfied, an attribute is implemented Constraint – a mandatory condition or a rule for an attribute Example: for eraser: constraint=made of unbreakable material not glass; Test these constraints

6. Preferences desirability in solutions Preference can also become an attribute (e.g., color preference) Analyze within the context to see if it becomes a constraint that can be doable or not Example: for eraser – should have a wooden base and a green color on surface

7. Expectations How well your product matches the client’s expectations Expectations need to be monitored and managed at every stage Expectation limitation process Generate list of expectations Revise and Optimize the list Limit the expectations – possible, deferred, absolutely not possible