Reviewing the solve

A new home for the Coupa Supply Chain documentation

Starting with Supply Chain 42, our documentation will be located on Coupa Compass. The help here will continue to be accessible for the foreseeable future, but will no longer be updated. If you need a Compass user account, contact your company’s Designated Support Contact (DSC).

You can access new and updated Supply Chain documentation in the following location on Compass:

https://compass.coupa.com/en-us/products/supply-chain-design-and-planning

Reviewing the solve

Once the design engine starts processing the scenario, you can review the solve.

Review the solve and view Run Details

On the Launch Pad page, click on one of the scenario entries. You see the run information page. This page provides general information about the solver run, such as the time taken to complete the solve and statistics specific to the technology, as well as solver metrics.

At the top of the page is the solve tracker, which provides nodes for the various steps involved in the solve. You can click on any completed node to review the information for that specific step. Each of the pages in the solve tracker displays a run log, which provides information about the selected step, such as input file generation results, solver activity and output data processing.

For Network Optimization, the solve tracker includes a node called Model Building. This node provides information about potential issues that are detected in a model audit. For additional information, refer to Model audit.

The Solving Model node includes sections in addition to the run log:

Run Overview - Provides a summary of information used in the current problem being solved, such as numbers of entities.
Run Status – Provides metrics as the problem (or sub-problem) is being solved.

You can review the files generated when the scenario was run by clicking Open Run Folder.

If your scenario completed with warnings or if the solve fails and errors are detected, you can click View Warnings to open the ErrorLog.txt file generated during the run.

Network Optimization metrics

The metrics reported in the Run Overview and Run Status for Network Optimization are the following:

Section	Metric	Description
Run Overview	Number of Customers	The number of Customers included in the run.
	Number of Sites	The number of Sites included in the run.
	Number of Demand Records	The number of unique Demand partitions, identified by Customer-Product-Period.
	Number of Potential Sites	The number of included Sites where Type = "Potential Site".
	Number of Products	The number of Products included in the run.
	Number of Periods	The number of Periods included in the run.
	Number of Transportation Lanes	The number of unique Transportation Lanes, identified by Source-Destination-Product-Mode.
	Number of BOMs	The number of Bills of Material included in the run.
	Number of Processes	The total number of Processes included in the run (Transportation, Sourcing, Production, Inventory, and Return Processes).
Run Status	Sub-problem ID	The identifier of the current sub-problem.
	Number of Constraints	The total number of linear constraints in the mathematical formulation of the problem.
	Number of Variables	The total number of decision variables (linear or integer) in the mathematical formulation of the problem.
	Number of Non-Zeroes	The number of non-zero elements in the solution matrix.
	Number of Integer Variables	The total number of integer decision variables in the mathematical formulation of the problem.
	Nodes Visited	The number of nodes, during the branch and bound algorithm, that have been checked so far.
Graph	Current Solution	The best integer solution found so far. When solving a model using Sequential Optimization, the Current Solution displayed in the Run Status is based on the last sequential objective that is used. As a result, this may not match the Total Cost in the Network Summary output table.
	Solution Bound	The best linear relaxation for the problem found so far.
	Gap Percentage	The gap between the Best Bound and Best Solution, as a percentage.

In addition, the Model Building node provides information about potential issues that are detected in a model audit. For additional information, refer to Model audit.

Transportation Optimization metrics

The metrics reported in the Run Overview and Run Status for Transportation Optimization are the following:

Section	Metric	Description
Run Overview	Problem Type	The problem type selected when running the scenario (or auto-detected by the solver).
	Optimize Fleet Size	Indicates if the Optimize Fleet Size option is selected.
	Baseline	Indicates if baseline shipments have been provided.
	Solver Setting	Displays the currently selected Solver Setting (such as "Fast, Basic Search")
	Number of Input Shipments	The number of input shipments in the current problem.
	Number of Invalid Shipments	The number of shipments in the current problem that are found to be invalid in pre-solve.
	Number of Asset Types	The number of unique Transportation Asset types in the current problem.
	Number of Asset Locations	The number of locations to which assets are assigned in the current problem.
Run Status	Route Generation	Indicates the current route generation phase based on the number of asset location-asset combinations. Standard Optimization: Total steps = number of pool sites (warehouses) * number of decompositions (user-defined) * (asset location - asset combinations) + 1 (if baseline routes defined) Interleaved Optimization: 3 (Clustering, Construction, Column Generation) + 1 (if baseline routes are defined) Hub Optimization: 3
	Route Selection	Indicates the progress of the route selection Mixed Integer Program (MIP). Standard Optimization: Total steps = number of pool sites (warehouses) Interleaved Optimization: 1 Hub Optimization: 1
	Route Improvement	Indicates the current route improvement phase. Standard Optimization: 0 if fleet optimization selected; otherwise number of pool sites (warehouses) * number of decompositions (user-defined) Interleaved Optimization: Between 2 and 6 (automatically adjusted based on problem structure and solver settings) Hub Optimization: 4
	Fleet Size Optimization	Indicates the current fleet size optimization phase based on the number of assets Standard Optimization: number of pool sites (warehouses); otherwise 0 if fleet optimization is not selected Interleaved Optimization: 1; otherwise 0 if fleet optimization is not selected Hub Optimization: 0
	Current Task	The task currently being run in the solve, such as Route Generation, Fleet Size Optimization.
	Progress	The percentage completion of the current task.
	Note	Provides additional run information, such as the number of new routes generated.

Inventory Optimization metrics

The metrics reported in the Run Overview and Run Status for Inventory Optimization are the following:

Section	Metric	Description
Run Overview	Run Type	Indicates the current problem type, such as Safety Stock Optimization or Service Level Optimization.
	Service Type	Indicates the current service type (Type 1, Type 2 or Type 3).
	Propagation Type	Indicates the current propagation type (Formula or Demand Series).
	Number of Periods	The number of Periods included in the run.
	Number of Sites	The number of Sites included in the run.
	Number of Customers	The number of Customers included in the run.
	Number of Products	The number of Products included in the run.
	Number of BOMs	The number of Bills of Material included in the run, based on Site-Product-BOM.
	Number of Lanes	The number of transportation lanes included in the run.
Run Status	Sub-model ID	Indicates the current sub-model ID.
	Solver Type	Indicates the current sub-model solver type (LP or DP).
	Propagation Type	Indicates the current sub-model propagation type (Formula or Demand Series).
	Service Type	Indicates the current sub-model service type (Type 1, Type 2 or Type 3).
	Number of Sites	The number of Sites included in the sub-model.
	Number of Customers	The number of Customers included in the sub-model.
	Number of Products	The number of Products included in the sub-model.
	Number of BOMs	The number of Bills of Material included in the sub-model.
	Number of Lanes	The number of transportation lanes included in the sub-model.

In addition to these metrics, you see Examine buttons for the 4 possible Status values: Successful, Infeasible, Failed, Skipped.

Review the results in Inventory Optimization output tables

Click Examine for the Status you want to review. If the Problem Type is:

Safety Stock Optimization, you see the Inventory Policy Summary table filtered for the current Scenario and Status values.
Service Level Optimization, you see the Service Level Summary table filtered for the current Scenario and Status values.
Safety Stock + Service Level Optimization, you see the Service Level Summary and Inventory Policy Summary tables filtered for the current Scenario and Status values.

Safety Stock Optimization results

Watch this video to learn how to use the Run Details and the Safety Stock Optimization Error Log to understand your Safety Stock Optimization results. Right-click on the video and select "Open video in new tab" for a larger display:

Last modified: Wednesday May 15, 2024

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