various ways, e.g. order of work, degree of completion of work, process followed, signing off to the next level, etc. The project manager ensures uniformity in these checklists in order to maintain effective documentation that can be referred to by site engineers and maintenance personnel. These checklists also contain minor tests done on individual items or parts, before the whole unit is as- sembled together. Then the cable lists and layouts are checked with the layout diagrams and colour-coded. The installation teams make sure that these minor but important points are taken care of and mentioned in the checklist, which forms the handover document between the installation and commissioning teams. The list in Figure A.4 contains some categories mentioned in a checklist. A.3.2 Powering-Up and System Precheck Powering-up the site equipment is a very crucial step as a simple mistake can lead to burnout of the whole equipment. The installation team connects the power supply modules to the battery backup but leaves the power termination to the equipment main power input in a switched-off condition. The commissioning engineer's prime responsibility is to check the incoming voltage and equipment earthing before proceed- ing further. After powering-up, all racks and subracks are rechecked for the correct voltage before any plug-in units are plugged in and then the system loading is checked. A.3.3 Commissioning The complexity of commissioning can depend on the type and range of equipment; a BTS can be commissioned in a few hours whereas an MSC may take days. It involves a variety of activities performed in a sequential or staggered manner as long as the whole process has its required continuity. It begins with checking all plug-in units and their interchangeability codes and versions. All cables and terminations are rechecked in accordance with the site-specific documentation. All bootprom chips, labels and then Roll-Out Network Project Management Commissioning Checklist Check jumper settings and EPROM versions Run Diagn