OBJECTIVES: An economic assessment is traditionally static in that it provides estimates based on the best available evidence for a one time snapshot. The objective of this abstract is to describe the process used to migrate an economic model developed in Microsoft Excel to a user-friendly and modifiable web environment.

METHODS: In 2020, the Institute for Clinical and Economic Review (ICER) launched ICER Analytics™, a cloud-based program that includes the ICER Interactive Modeler™. The Interactive Modeler is a web environment that is running on the “eModels Platform” developed by Digital Health Outcomes, LLC and includes the cost-effectiveness and budget impact models used in ICER reviews. Within the ICER Interactive Modeler, users can change model inputs to examine the influence of those real-time changes on results.

RESULTS: First, a standardized modeling template was developed to serve as a bridge between the Excel file and web-based model inputs and result displays. This template includes a standard location of all model inputs and outcomes to allow for a systematic transition from the Excel environment to the web environment. Then, procedures for migrating the Excel template to the web environment were established. These include converting the template in JavaScript to run in a V8 browser engine, uploading the template to the web environment, building user-modifiable input tables, and mapping to dynamic result displays. Performance optimization is conducted to reduce loading times. Finally, a comprehensive review process is initiated that involves comparing the default results in the web environment to the Excel file and examining each change in input and its respective results change. These steps have been developed and implemented for 21 models in 19 disease areas used in ICER reviews.

CONCLUSIONS: The migration of these Excel files to the web environment allows for ongoing updates to the model evidence to produce dynamic economic assessment findings.