Case Adaptation Sources: –Chapter 8 – –

Adaptation New problem Selected case Adaptation knowledge Solution

Classes of Adaptation Transformational Analogy  Substitutional Adaptation  Feedback based  constraint based  Compositional adaptation Generative Solution Adaptation  Transformational Analogy  Derivational Analogy

Substitutional Adaptation Let C = (P,S); A problem P and a solution S Adaptation problem:  Given  A problem P’  A case C such that P is similar to P’  Search a substitution  such that  (S) solves P’   is not a substitution in the traditional sense

Example Support for PC sale: Cases are configuration episodes of PCs User specifies his/hers requirements System selects best PC (CCBR) and change some components Example rules (Substitutional Adaptation): If (query.application = ‘database’ and case.diskSpace < 2GB) then target. diskSpace  4GB

Example (2) Example rules (Substitutional Adaptation): If (query.application = ‘games’ and case.application  ‘games’) then AddObject target.addJoystick AddObject target.addSound Other rules to configure joystick and sound

Substitutional Feedback-based Car type: sport Color: red Seating: 2 Valves: 48 Type: 5.7L Model name: name1 Price: 200,000 Year: 2003 Feedback: not successful Cause: price is too high Car type: sport Color: red Seating: 2 Valves: 48 Type: 5.7L Model name: name1 Price: 200,000 Year: 2003 Feedback: successful Car type: sport Color: red Seating: 2 Valves: 40 Type: 3.6L Model name: name 2 Price: 150,000 Year: 2000 Feedback: successful Adapt CaseC (adapted) CaseA (new) CaseB (old) Retrieve Copy

Substitutional Constraint-based Case ID: 123 Speed: high Price: middle Usage: sport Antitheft performance: high Model Name: Toyota Sedan 07 Price: 10,500 Antitheft system: Product A Case ID: 456 Speed: high Price: middle Usage: sport Antitheft performance: middle Model Name: Toyota Sedan 07 Price: 10,500 Antitheft system: Product A Case ID: 123 Speed: high Price: middle Usage: sport Antitheft performance: high Model Name: Toyota Sedan 07+ Price: 11,000 Antitheft system: Product B CaseA (new) CaseB (old) Retrieve Copy adapt CaseC (adapted) Constraint: Antitheft performance: high Antitheft performance: product B Price: +500

Compositional Adaptation Let C = (P,S); A problem P and a solution S Adaptation problem:  Given  A problem P’  A case C such that P is similar to P’  Search a sequence of substitutions  1, …,  n such that: S’ is a solution for P’ (P,C) …(P’,S’) 11 22 nn

Adaptation Operators (2)  Reminds you of anything? Planning/rule-based reasoning!  Roles of operators/rules: General knowledge about the domain  (P,C) …(P’,S’) 11 22 nn Adaptation knowledge