The UK Network Rail power surge On December $19,2019,$ the United Kingdom$$s Network Rail sent out a series of tweets detailing a signalling control issue that halted rail services the previous day for over an hour. The Southern Rail, which handles over $7,000$ passenger and freight services daily, experienced a $20-$second power surge that knocked out four signalling control stations at one of their busiest sections. Technicians were sent to manually reset systems that automatically shut down in order to protect from any surge damage. Backup power supplies never kicked in because there was still power, and UPS systems provided no surge protection. $($Network Rail continues to investigate how to prevent such a surge from impacting the systems in the future.$)$ The tweets and subsequent website post have received acclaim from many people. Affected customers in particular praised Network Rail$$s clear apology, the candid explanation of what happened, and their next steps in investigating and preventing recurrence. Question $1$: The implementation project $[20$ marks$]$ Outline the key phases of the problem management implementation project and explain each phase in relation to the case above? $(20)$