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IBM Data and AI Ideas Portal for Customers


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Decision Optimization CPLEX & For Watson Studio

Showing 68

Run optimization solver invocations in parallel

Extract from SAS PROC OPTMODEL COFOR new feature:Be able to run optimization solver invocations in parallel, in iterations of a concurrent FOR loop that is specified using the COFOR statement. The COFOR statement operates in the same manner as the...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Calling external .NET code from OPL

Offers a way to interact with external code written in .NET from OPL.This feature would allow us to:• write a complex dedicated OR algorithm (such as a shortest path or flow algorithm) to be used as one step of a decomposed application• connect yo...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Improve constraint priority attachment in OPL

Actually we have to use OPL script to attach a relaxation priority to a constraint. It will be easier to attach this priority at the creation of the constraint. Reason is that a constraint tupleset can easily include a priority field: tuple rvCons...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Piecewise function with input as coordinate (x,y) of curve's points

the actual piecewise function in OPL takes as input abscissas and vector coefficient to construct the function.Many time people have user have the (x;y) coordinate. to do that you need to write OPL code to find the vector coefficient.Would be grea...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Make CP cumulFunction and expressions accept float instead of int

cumulFunction and expressions currently only allow the resource usage to be int which is not useful for all resource types. Whilst a workaround of multiplying the int by a large number to approximate the float is possible there are limitations and...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Improve OPL Interfaces by providing dynamically typed API and a “façade” compatible with the .NET framework

Using OPL interface in .Net is cumbersome. Manipulate data elements object and result is far from being trivial.By example, instantiate an int look like that: OplDataSource dataSource = new MyCustomDataSource(oplF); internal class MyCustomDataSour...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Improve OPL Interfaces by providing field access infer by using the OPL model schema

Modify coefficient, adding variable, iterate on tupleset, modifiing dataElements and almost all operation in the OPL interface are really counter intuitive. Object uses by OPL are not directly compatible with the framework object. Ituple!= Tuple. ...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

a new parameter to control to force MIPStart if the variables are feasible

CPLEX choose to use MIPStart or not accoring to the heuristic. But sometimes the user think MIPStart values as particular variables is the best way to solve the problem. So we’d like to request a new parameter to control to force MIPStart if the v...
11 months ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Not under consideration

OPL language enhancements : cannot slice with nested constraints on subTuples

I've been a happy user of OPL language, which has lots of wonderful features. However, there is one remaining recurrent issue in data modeling, which prevents some intuitive modeling. This is called "cannot slice with nested constraints on subTupl...
almost 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Not under consideration

Tuning Tool should work for CP as well as CPLEX

The Tuning Tool only works for CPLEX. It should also be made to work for CP.
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration