Matakuliah
Tahun
Versi
: H0383/Sistem Berbasis Pengetahuan
: 2005
: 1/0
Pertemuan 11
Akuisisi Pengetahuan
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Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• Menjelaskan prinsip akuisisi Pengetahuan
pada expert systems
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Outline Materi
• Pengertian
• Metode
• Knowledge Engineering
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Pengertian
• Sistem menyerap Pengetahuan dari
Knowledge Engineer melalui representasi
pengetahuan.
• Pengetahuan diserap oleh Knowledge
Engineer dari sumber Pengetahuan
melalui proses yg biasa disebut
Knowledge Acquisition
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Pengertian
• Source of Knowledge:
documented and undocumented
• Level of knowledge:
shallow(surface) and deep
• Categories of Knowledge:
Declarative, procedural, semantic,
episodic, metaknowledge
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Difficulties of acquisition
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Expressing the knowledge
Transfer to machine
Number of participants
Structuring knowledge
Other factors
Expert unwilling / not time to corporate
Testing and refining is complicated
Tendency to collect from one source
Preference to documented knowledge
Interpersonal communication between expert and
engineer
• Inconstantly expert knowledge
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Skill of KL Engineer
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Computer skills
Tolerance
Effective communication abilities, diplomacy
Broad education
Advanced, socially sophisticated verbal skill
Fast learning capabilities
Understanding of org and individual
Intelligence
Empathy and patience
Persistence
Logical thinking
Self confidence
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Process of knowledge
acquisition
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(Hayes-Roth)
Identification (output: requirement)
Conceptualization : Find concept to represent
knowledge (output:concept)
Formalization: Design structure to organize
knowledge (output: structure)
Implementation: Formulate rule(frame, etc)
(output:Rules)
Testing: validate rule that organize knowledge
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Methods of acquisition:
• Interview: structured and
unstructured(informal)
• Tracking method: protocol analysis
• Observation
• Expert driven
• Repertory Grid analysis
• Induction
• Documented acquisition
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Measure of validation:
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Accuracy : How well the system reflect the reality
Adaptability: possibility for future development/ change
Completeness: Portion of necessary knowledge that
Is included in the knowledge base.
Breadth: how well the domain is covered.
Depth: degree of detail knowledge
Reliability
Robustness
Sensitivity: impact of change in knowledge base on
quality of output
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Penutup
• Tugas seorang Knowledge Engineer
adalah mengambil intisari knowledge dari
sumbernya.
• Sumber terbagi dua yaitu documented
(buku, tulisan dll) dan undocumented
(domain experts)
• Knowledge Engineer harus dapat
menterjemahkan Pengetahuan tsb. ke
dalam sistem berbasis Pengetahuan
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