Outside of our Capitalized Labor which leverages project planning / activities, we plan all of our Capex this way. That said even with planning we still have to get "cute" to plan by month and get amortization to automatically calculate.
Basically for a specific Capex line item we create a separate line for each month with a defined production date so we can accurately project amortization / depreciation going forward.
Obviously this is a time consuming exercise and probably not the most efficient way to get this monthly breakout however we haven't found another approach that allows for dynamic and real-time feedback.
Would welcome any insight from others...