IBM Planning Analytics (TM1) remains one of the most powerful planning and modelling engines used by Finance teams worldwide. Yet many organisations eventually experience frustration with their TM1 environments — slow performance, painful upgrades, rising support costs, and the quiet return of Excel. Contrary to popular belief, these challenges are rarely caused by TM1 itself. They are symptoms of a modernisation gap. The Hidden Drift Problem in TM1 Environments TM1 models often start clean, efficient, and purpose-built. Over time, however, incremental changes accumulate: New dimensions added ...