Definition:
Unlike conventional deterministic approaches such as PERT or CPM, the Graphical Evaluation and Review Technique (GERT) is a complex network analysis tool including probabilistic branching and loopbacks. GERT enables difficult decision-making situations whereby activities could have several possible results, including partial completion, repetition, or conditional execution.
Key Aspects:
- Uses probabilistic paths instead of fixed durations, allowing for uncertainty modelling.
- Incorporates conditional branching, meaning tasks can have different execution scenarios.
- Supports loops, enabling repetitive tasks to be factored into the analysis.
- Helps in decision-making by providing weighted probabilities of various project paths.
Example:
In a research and development project, several tests would have to be repeated depending on the first outcomes. GERT recognises such iterative processes and makes sure project plans accurately represent actual uncertainty.
In research, product development, and highly creative industries specifically, GERT is a potent tool for projects with great variation and decision-based processes.
