Discrete models
Choose a subtopic, explore its examples and practise with feedback.
Choose a subtopic.
Explore discrete models for Year 12. Each subtopic has sample questions and worked answers; choose the skill you want to practise.
Critical path analysis
Precedence tables and directed activity networks; Dummy links when using activity-on-arrow representation; Forward/backward scans; Minimum completion, critical path, earliest/latest starts and slack; Delay/reduction effects and contextual limitations
Examples, answers and practiceAssignment problems
One-to-one task allocation and minimum cost; Hungarian row/column reduction, zero cover and uncovered-value adjustment; Maximum-profit conversion; Non-square arrays/dummy rows or columns; Multiple optima and model assumptions
Examples, answers and practiceMake, test and investigate.
Create a project schedule
Create tasks, durations and precedence relationships. Perform forward and backward passes, identify float and critical tasks, then test a changed duration.
Guided activity · No gradeSolve an assignment with Hungarian steps
Create a cost table, perform row and column reductions, cover zeros and adjust uncovered entries. Select a one-to-one assignment and verify its original-table cost.
Guided activity · No grade