Think about the risk register for your project and answer following question: Point out two risk IDs for which a single decision tree can be drawn and discuss your selection of risks. What decisions can be made for these two risks through a single decision tree analysis considering chance events? Appendix- Risk Register Risk Id Status Risk Title Risk Description Impact / Modelling Note Risk Measure Scheme Generic Repair time will impact on commissioning New equipment (e.g. cable joints) fails when commissioning the new system Open New equipment fails Programme delay cost REF005 REF006 Open Specialist staff Specialist staff may be required and they are booked in advance Scheme not viable Programme delay cost REF018 Open Freight Operations Specialist staff required to undertake the works may be unavailable Unable to rationalise current freight/passenger operations to achieve business case capacity Possessions granted late by NWR authority, works cannot be completed during possession Programme objectives Additional shift costs if possessions lost REF002 Open Late possessions Cost REF004 Open Cost REF010 Open Cost Estimating uncertainty There is uncertainty in the rates/quantities -10% to +40% on construction/labour included in the base cost costs Infrastructure damage Existing infrastructure may be damaged during Cost of repairing/ replacing damaged construction equipment Polluted ground Uncertain extent/ activity of ground contamination Cost of treatment/ disposal different from (e.g. PCBs) expected Availability of signalling records and resource to cost of regenerating signalling records & Signalling Records undertake any modifications parallel design REF013 Open Cost REF015 Open Cost REF016 Open Retail Telecoms Cost Lack of capacity of existing retail telecoms Increased scheme costs for upgrading control centre to accommodate additional existing control centres. Moderate demand requirements at proposed new and altered requirements stations Requirement to relocate/ divert general line side Increased cost of diversion/protection and signalling and telecommunication as sets timescales for Signalling Maintenance Testing Handbook (SMTH) procedures. Cables routes evident at all locations REF017 Open Cable Diversions Cost Theft and vandalism disrupts works REF019 Open Theft and vandalism Cost Cost of replacing damaged/ stolen assets (Max equipment stolen prior to a major possession May be necessary to pay for removal of vegetation Additional site clearance costs (vegetation) REF023 Open Site clearance Cost Additional site clearance costs (vegetation) May be necessary to pay for removal of vegetation REF023 Open Site clearance Cost 2 1 REF024 Open Fly tipping May be necessary to remove fly tipping materials Additional cost of removal and disposal Cost 2 1 REF025 Open Japanese knotweed Cost 2 1 REF026 Open SSSI Cost Maybe necessary to remove Japanese Additional costs of specialist removal Knotweed Working in close proximity to a site of special Cost of specialist consultants scientific interest (e.g. Sand eels must not be disturbed) Issues associated with safety case approvals Cost of design changes to satisfy Department of Transport 1 1 REF028 Open Safety Case Cost 3 2 REFO 29 Open Interfacing Projects Cost 2 1 Planned interfacing enhancement/renewal schemes Exceptionally adverse weather occurs (while constructing) Modification to NUCKLE design to accommodate interfacing designs Failure to achieve productivity, inability to get materials or labour to site Schedule REF001 REF001 Open Weather 2 3 7 Risk Id Status Risk Title Risk Description Impact / Modelling Note Risk Measure Probability Impact REF027 Open OHLE records are old. Scope unknown Additional cost and programme delay. Cost Overhead Electrification Equipment (OHLE) records 3 3 | Additional cost and programme delay REF028 Scope of re-signalling required to develop new passenger bay platform is currently uncertain Open Signalling Scope Cost 2 2 REF030 Open Power Capacity Cost 4 3 Inadequate capacity of power supply and local Increased cost of power supply grid network to accommodate the electrical infrastructure and delay to the programme demand requirements of the proposed as a result of necessary possessions. re configured railway station Uncertain land take from maintenance compound Cost of alte mative parking for station and adjacent station car park operator REF031 Open Additional Land Cost 5 2 REF032 Open Station Change Cost 4 2 REF034 Open Passenger Flows Station operator objects to proposed changes to cost of additional changes to meet station existing station (e.g. passenger access from car operator requirements Ipark to station) Inability of proposed layout to accommodate Cost of additional station improvements passenger flows from new platform under Warwick road bridge to Coventry station complex. Outfall for drainage and track drainage is either at Additional drainage measures are full capacity or cannot be established required. Nominal increase in drainage volume Cost 3 4 REF035 Open Drainage Cost 2 2 REF037 Open Network Change Cost 2 4 REF040 Open Platform Derogation Objections to network change proposal to Additional permanent way material costs. remove existing operational sidings Programme delay whilst negotiate and satisfy objections Required derogation for building platforms on 1 in Additional cost of vertical track realignment 300 track gradient rejected Uncertain ground conditions Cost of ground improvements Cost 1 2 REF0151 Open Ground conditions Cost 2 2 REF0161 Open Identified services Cost 3 2 REF01 71 Open Unidentified services Uncertain location of known underground Cost of protection/diversion different from services expected Uncertain location of unknown underground Cost of protection/diversion different from services expected 3rd party objections to scheme Additional cost to satisfy objections Cost 2 3 REF0181 Open 3rd part objections Cost 2 1 REF0201 Interface between Open projects Interface with Connecting Coventry and Friar gate Programme delays and increased cost of construction logistics and design iterations Cost 5 1 Uncertainty of p-way quantities and rates P-way costs different from expected REF0211 Open Estimating uncertainty Cost REF0221 Open Estimating uncertainty Uncertainty of signalling quantities and rates Signalling costs different from expected Cost REF0231 Open Cost REF0241 Open Estimating uncertainty Uncertainty of platform works quantities and rates Platform works costs different from expected Estimating uncertainty Uncertainty of station building ancillaries Platform ancillaries costs different from quantities and rates expected Estimating uncertainty Uncertainty of prelims quantities and rates Prelims costs different from expected Cost REF0251 Open Cost REF0261 Open Market conditions Cost An unknown future legislation change on design Unknown features. Prevailing market conditions. Materials prices are Difference from expected different from expected. REF0281 Open Market conditions Cost