Unless you give us an idea of what you want to commission how can be give you a good idea of commissioning? Muhammad, since this is your first post so please don't just write wildly. Prepare your questions in detail so that we can understand to help you out.
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I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
may you mean water balancing, commissioning is a ward used for machines or heat exchanger and so on where some presses is happening or developing like cooling of air, heating, pumped fluid and so on, please be more specific, in this blog there is many different professional engineers each will understand your enquiry from his point of view.