es - incorrect LAC ADJS inconsistencies - incorrect MCC or MNC ADJS inconsistencies - incorrect PriScrCode ADJS inconsistencies - invalid target CID ADJS one-way neighbours ADJS target DN empty ADJW (GSM to WCDMA adjacencies) ADJW distance > 20 km ADJW inconsistencies - incorrect LAC ADJW inconsistencies - incorrect MCC or MNC ADJW inconsistencies - incorrect PriScrCode ADJW inconsistencies - invalid target 3G CID ADJW one-way neighbours (2G > 3G) ADJW target DN empty CID (cell identity) Duplicate 2G CID Duplicate 3G CID Adjacency number checks WCEL with ADJG and very few ADJS (ADJG - ADJS > 15) WCEL with ADJG but no ADJS WCEL with ADJS and very few ADJG WCEL with ADJS but no ADJG WCEL with no ADJG WCEL with no ADJS Fault Management Fault management is a continuous process where faulty hardware units and software related faults are fixed. A special fault management effort should be given to the area that is about to be optimised prior to any optimisation activities. All critical alarms should be cleared and it should be verified that sites are available and in a working state. RF Tuning The radio environment is measured, benchmarked and analysed to verify and optimise the RF perfor- mance. The RF performance is also analysed to find out any parameter, service performance or potential site integration problem issues. In the initial RF tuning phase the cluster of cells is measured and the overall RSCP and Ec/No values are benchmarked against predefined quality targets. The aim is to reach the performance target for RF performance. The performance target can consist of the coverage target (RSCP), the quality target (Ec/No), minimising pilot pollution areas and limiting soft handover area. Radio Network Optimisation As the first step the RF KPIs for the cluster are benchmarked. Benchmarking RF KPIs can be used to verify that the RF performance improves as a result of implementing the tuning recommendations Secondly, the overall RSCP is analysed. This can be done using an analysis tool that visualises the measurement 