Precedence constraint
A precedence constraint requires one task or operation to occur before another dependent task or operation.
Optimization Algorithms: AI techniques for design, planning, and control problems
A precedence constraint requires one task or operation to occur before another dependent task or operation.
- How it is used
- Constrains assembly-line task sequences so dependent operations occur in the required order during workstation assignment.
- How deep it goes
- Defines dependencies through diagrams and examples, then stops short of formal algorithms for checking every constraint.
- Examples
- Uses bike assembly dependencies involving frames, forks, handlebars, and wheels, plus a precedence diagram for numbered tasks.
- What you can do after
- Evaluate task sequences and workstation assignments for violations of required operation order.
100 SQL Server Mistakes and How to Avoid Them
A precedence constraint is an SSIS control-flow connection that determines when a downstream task runs relative to a preceding task.
- How it is used
- Controls SSIS task sequencing and conditional error-handling behavior within a package control flow.
- How deep it goes
- Defines three execution conditions and distinguishes them from data-flow paths, without detailing advanced configuration.
- Examples
- Uses green, red, and blue constraint indicators and contrasts task execution with row-routing data paths.
- What you can do after
- Configure SSIS task sequencing and route follow-up work after success, failure, or completion.
Read how 100 SQL Server Mistakes and How to Avoid Them explains precedence constraint →
Related concepts
- control flowused by · Control flow is the order and path of execution through a program or process, including sequencing, branching, repetition, and transfers between operations.
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