## Request for Simulation-Based Optimization Problems

We are building a collection of problems for distribution to the optimization community.
Problems and questions can be sent to *wild* and/or *akannan* at *mcs.anl.gov*.
We provide the following checklist to aid submission of problems. As many details as possible are appreciated but any problem information would be useful.
Please include references describing the problem/simulator or tell us if you would like the problem source/details to remain anonymous.

### Problem specifics

- The number of continuous, discrete (e.g., integer), binary, and categorical variables (continuous preferred for first collection).
- Lower and upper bounds on the variables.
- Number of constraints and type (binary, linear/nonlinear, algebraic/simulation-based).
- Which constraints/bounds can be violated but still result in evaluation of the simulator.
- Whether the objective/constraints contain any stochastic components (e.g., multiple evaluations at the same point can return different values).
- Does the simulator not evaluate at some points even when variables are within the bounds?.
- Is it known that the simulator will not evaluate correctly within the feasible region specified by the bounds/constraints? How is this indicated?
- Brief problem description (mathematical and/or qualitative) and references.
- Does the simulator involve any lower level problems that depend on tolerances, meshes, etc.? Can these be modified?
- Typical evaluation time for the simulator (.01-100 seconds preferred). Is the time more or less the same at all feasible points?
- A default/starting point (and associated function/constraint values to check for correctness) and best known solution.

## Simulator specifics

- Most important - source codes (C,C++,Fortran and MATLAB preferred) and makefiles (or compile strings).
- Number of individual source codes (to confirm completeness) and specifics on which evaluate the objective/constraints.
- Further open source dependencies (codes with proprietary dependencies not collected at this time) or open source compilers (other than gcc, g++ and f95).
- Can evaluation be done in parallel? Is a parallel driver available?
- Distribution license information of the source codes.