Ralph W. Tyler, one of the first inventors of the evaluation project in
1949, believes a clear, concise, and specified objective is vital for the
success of an evaluation, or “Goal Attainment Model or Objectives”.
Robert E. Stake has integrated concepts from Lee Joseph Cronbach and
Michael Scriven to create a systematical evaluation format, transforming
both concepts into a more concrete structure by considering a wide array
of information from different groups of individuals involved with the
project being evaluated. To make a detailed project evaluation, a thorough
explanation of the project is indispensable. Stake proposed a systematic
evaluation model and named it “Countenance Model”. This model
emphasizes that evaluating a project involves two parts: ‘Descriptive’ and
‘Judgment’.