The Floor Plan Editor app, introduced in ArcGIS Enterprise 11.2, is a simple and intuitive web application that allows Facilities or Operations staff who are not trained in GIS to make edits directly in a browser to help keep floor plans up to date and even try out what-if scenarios to meet future needs. 

More information on ArcGIS Indoors: https://www.esri.com/en-us/arcgis/products/arcgis-indoors/overview