We present details of the debate, which will be held on the second day of the nationwide conference „Projekt BMS 2017” on 19th October, from 11:40 to 13:40. The keynote topic is „Investment Process with application of BMS Systems. Modernization of public and office buildings according to the EU Directive „. During a discussion panelists will examine the stages of investment process. Issues related to investment planning will be discussed. The topics such as: commissioning and consulting at the stage of investment assumptions will be considered – technical consultancy, supporting the investor by the manufacturer. Panelists will look at the tools supporting the investment process. The examplary property with implementation will be discussed. The issues related to the role of technical team and optimisation of the commissioning will be raised.