A Sufficient Condition for Backtrack-Free Search
Journal of the ACM (JACM)
Synthesizing constraint expressions
Communications of the ACM
Backtrack programming techniques
Communications of the ACM
Staffing a software project: A constraint satisfaction and optimization-based approach
Computers and Operations Research
Improving the performance of vector hyper-heuristics through local search
Proceedings of the 14th annual conference on Genetic and evolutionary computation
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Many engineering problems such as Job Shop Scheduling can be categorized as constraint satisfaction problems. We propose the Dynamic Constraint-directed Ordered Search (DCOS) to solve such problems. DCOS repeatedly re-arranges the search order of the variables and eliminates its local inconsistencies by using a low order network consistency algorithm. As a result, it reduces the width of the search tree. The reduction of the width of the search tree causes the decrease in the number of backtrackings required to find the solution. We have applied DCOS to the Graph Coloring Problem and the Zebra Problem with a second order network consistency algorithm and obtained almost-backtrack-free searches for both cases.