MetallurgyRiskAssessment–GuidanceNotesTheexpertauthorisrequestedtoestimatetherisksassociatedwiththeMETALLURGICALaspectsoftheproposedprojectintheCompany’spublishedTechnical&EconomicStudywhichisbeingreviewed.TheMetallurgyaspectshavebeencondensedinto4mainriskcategories.Thisisobviouslyasomewhatsubjectiveassessment.Thefollowingtablesareintendedtoassisttheauthorinreducingthesubjectivityoftheriskrating.Provideanestimateforthefollowingriskcategoriesbasedonthefollowing:RiskCategoryLikelihoodConsequenceTechnicalmaturityandscaleriskfactor1–51-5Resourcecharacterisationandmetallurgicaltestwork1–51-5Correctinterpretationofresourcecharacterisationandmetallurgicaltestworkdatatoestablishanapplicableprocessdesignbasis1–51-5Executionofprocessdesign1–51-5DigbeeLikelihoodTable:ProbabilitythatRiskEventcouldberealisedastheprojectmovestomoreadvancedstudiesand/orintodevelopmentLevelDescriptionCriteria(readaseither/or)5AlmostCertain->90%chanceofthiseventhappening-Couldoccurmorethanonceduringthestudyorprojectstage4Likely-60-90%chanceofthiseventhappening-Couldeasilyoccurandhasgenerallyoccurredinsimilarstudiesorprojects3Possible-30-60%chanceofthiseventhappening-Occurredinaminorityofsimilarstudiesorprojects2Unlikely-5-30%chanceofthiseventhappening-Knowntooccurinsimilarstudiesorprojects,butonlyrarely1Rare-<5%chanceofthiseventhappening-Hasnotoccurredinsimilarstudiesorprojects,butcouldDigbeeConsequenceTable:Negativeimpactsthatcouldberealisedastheprojectmovestomoreadvancedstudiesand/orintodevelopment.Positiveimpactsarenotrisksbutcanbediscussedinthe‘Notesrelatingtoriskscores’sectionoftheDigbeeReportasmitigatingfactorsLevelTechnicalmaturityandscaleriskfactorResourcecharacterisationandmetallurgicaltestworkTheExpertshouldconsidertheconsequencesassociatedwiththematurityoftheproposedtechnologyandscalingriskfactor.Suchfactorsmightinclude:●Istheproposedprocessand/orscaleknowntotheoperator?●Istheproposedprocessand/orscaleknowntotheindustry?●Istheproposedprocessand/orscalecompletelynew?TheExpertshouldconsiderconsequencesassociatedwiththeresourcecharacterisationandmetallurgicaltestwork.Suchfactorsmightinclude:●Hasenoughtestworkbeendoneatthecorrectscaletomitigateprocessrisk?●Whererequiredwaspilotplanttestworkconducted?●Isorebodymineralogyandvariabilityunderstood?●Havethetestworkresultsthenecessaryconsistencyandaccuracy?5-Critical#●ImpactonProduction/Recoveries>20%●ImpactonCapex>50%●ImpactonProjectSchedule>50%●ImpactonProductionRamp-up>50%,and/or●Capacity<80%ofNameplate●ImpactonOpex>25%●ImpactonProduction/Recoveries>20%●ImpactonCapex>50%●ImpactonProjectSchedule>50%●ImpactonProductionRamp-up>50%,and/or●Capacity<80%ofNameplate●ImpactonOpex>25%4-Major#●ImpactonProduction/Recoveries<20%●ImpactonCapex<50%●ImpactonProjectSchedule<50%●ImpactonProductionRamp-up<50%,and/or●Capacity>80%ofNameplate●ImpactonOpex<25%●ImpactonProduction/Recoveries<20%●ImpactonCapex<50%●ImpactonProjectSchedule<50%●ImpactonProductionRamp-up<50%,and/or●Capacity>80%ofNameplate●ImpactonOpex<25%3-Moderate●ImpactonProduction/Recoveries<10%●ImpactonCapex<20%●ImpactonProjectSchedule<20%●ImpactonProductionRamp-up<20%,and/or●Capacity>90%ofNameplate●ImpactonOpex<10%●ImpactonProduction/Recoveries<10%●ImpactonCapex<20%●ImpactonProjectSchedule<20%●ImpactonProductionRamp-up<20%,and/or●Capacity>90%ofNameplate...
