The root page 15DOTs60ia13:Tutorial could not be found in space 15.S60 SSIM: Software Tools for Operations Research.
User Cuts in CPLEX
User cuts are, at a high level, valid inequalities for an integer program that strengthen the formulation, but are not required for correctness of the formulation. For example, in the 0-1 knapsack problem,
\[ \begin{aligned} &\max&\sum_{i=1}^n v_i x_i\\ &\text{subject to}& \sum_{i=1}^n w_i x_i \leq b &x_i & \in \{0,1\}&i&=1,\ldots,n \end{aligned} \]CPLEX checks for violated user cuts at the highlighted stage in the diagram below.
