################################################################################################## Attention: We found an error in our optimisation template, related to the results that are provided in figure 2. We are working on fixing the issue and upload a corrected version in the upcoming days. Dataset for the contribution "Role of the Cost Function for Material Parameter Determination" to the "Fire and Evacuation Modeling Technical Conference" (FEMTC) 2020. It contains: the complete data of each IMP run, simulations of the best parameter sets of each IMP run, the IMP run for the reaction kinetics parameters, the validation simulations, the plots shown in the article and presentation, as well as the Jupyter Notebooks used for the data analysis. Note: The copper foil thickness is set to0.2 mm in all simulations, due to a typo in the FDS input file template and should have been 0.025 mm according to the article describing CAPA II. A simulation with the correct thickness showed very little divergence from the conducted simulations, thus the effect of the typo is regarded to be neglectable. Therefore, all files in this data repository are using the incorrect initial value. The mentioned simulations and a plot comparing both results are provided in this repository. Version 1.1: Added slides and article.