Determine Schedule Status - ProjectEngineer.NET

Schedule Variance (SV) · If SV is negative, the task is behind schedule. · If SV is zero, the task is on schedule · If SV is positive, the task is ahead of ... Menu It’stimetodeterminehowfar aheadorbehindscheduletheprojectis. Todothis,wewillcalculatetwovariablesfromtheinitialfour wegatheredfromtheprojectdata: ScheduleVariance(SV) SchedulePerformanceIndex(SPI) ScheduleVariance(SV) Theschedulevariance,usuallyabbreviatedSV,answersthequestion: Howfaraheadorbehindscheduleistheproject? Itisexpressedintermsofthetask budget,nottheactualhoursordaysaheadorbehindschedule. TheSVmustbecalculatedforeachtaskandsummedtodeterminetheoverallprojectSV. Theformulais: SV=EV–PV IfSVisnegative,thetaskisbehindschedule. IfSViszero,thetaskisonschedule IfSVispositive,thetaskisaheadofschedule. Forexample, SV=-$500meanstheprojectisbehindschedule. SV=$0meanstheprojectisrightonschedule. SV=$500meanstheprojectisaheadofschedule. Withtheschedulevariance,positiveisgood. Youcancomparethesizeoftheschedulevariancetothetask’sbudget. Forexample,iftheaboveschedulevarianceof$500isforataskwithabudgetof$1,000,thetaskissignificantlybehind. Butforataskvalueof$100,000thisisnotnearlyasconcerning. Inourrunningexample,wewilladdacolumntotheearnedvaluetableforScheduleVariance. SV=EV–PV SV=$2,000–$3,000=-$1,000. ID Name Start End BAC PV EV AC SV 100 SetupDatabase Mar.1 Mar. 10 $10,000 $3,000 $2,000 $4,500 -$1,000 Thistaskhasaschedulevarianceof-$1,000onataskvalueof$10,000,thereforeitis10%behindschedule. Itshouldprobablybeflaggedforactionbytheprojectmanager,oratleastanexplanationdetermined. Schedule PerformanceIndex(SPI) TheSchedulePerformanceIndex,normallyabbreviatedSPI,answersthequestion: Howefficientlyareweusingtime? ItissimilartotheScheduleVariance(SV). Italsotellsyouhowfaraheadorbehindschedulethetask is,butitisarelativemeasureratherthananabsoluteone. Theformulais: SPI=EV/PV IfSPIislessthan1,thetaskisbehindschedule. IfSPIiszero,thetaskisonschedule IfSPIisgreaterthan1,thetaskisaheadofschedule. Forexample, SPI=0meanstheprojectworkhasnotstarted. SPI=0.5meanstheprojecthasperformedhalftheworkitwassupposedtoatthispoint. SPI=1.0meanstheprojectisonschedule. SPI=2.0meanstheprojecthasperformedtwicetheworkitwassupposedtoatthispoint. WiththeSPI,greaterthan1.0isgood. WewilladdacolumntothetableforSPI. SPI=EV/PV SPI=$2,000/$3,000=0.67. ID Name Start End BAC PV EV AC SV SPI 100 SetupDatabase Mar.1 Mar. 10 $10,000 $3,000 $2,000 $4,500 -$1,000 0.67 Itiseasytoseethattheexampletaskhasaccomplishedonlytwothirdsofwhatitshouldhaveatthispoint. Interpretation Itiswellunderstoodthatprojectswhichgobehindscheduleearlyonwillalmostalwaysfinishbehindschedule. Thelongerthescheduleproblemspersistwithoutmajorconsequencestotheprojectteam,themorerootedthebehaviorwillbecome,creatingacultureofmisseddeadlinesthatbecomesextremelydifficulttocorrect. ForthisreasontheSVandSPIshouldbeinspectedearlyandoften. Infact,oneofthebigbenefitsofearnedvaluemanagementistheabilitytogetanearlywarningsignofprojectissues. Aschedulevarianceof,say,$1,000ona$50,000projectmightbecompletelyunnoticedifyouweren’tcalculatingSVandSPI,butasimplechatwithamemberoftheprojectteamcouldavoid amajormisseddeadlinelateron. It’samazinghowmanyprojectsdon’tknowtheirtrueschedulestatusuntilthelatestages,whencorrectionsarecostlyanddifficulttomake. Thecorrecttimetocorrectscheduleproblemsisatthebeginning,nottheend,oftheproject. Infactitisoftennotsomuchtheactualschedulevariancethatmatters,butthetrend. GraphingSVovermultiplestatusperiodsisoftenaveryrevealingexercise,andgivesyouafantasticpictureofhowtheprojecthasbeenperforming. ThetwovariablesSVandSPIgiveyouanat-a-glancelookattheprojectschedulestatus. Onthenextpagewewilldothesamefortheproject’sbudget. Navigation PreviousPage: GatherWorkPerformanceInformation NextPage: DetermineCostStatus Home: EarnedValueTutorial ProjectManagementSoftware FreeProjectManagementSoftware (3freeprojects,nocreditcards,justmanageyourprojects) Login CreateAccount Forgot Username/Password? PMPExam:TheUltimateStudyGuide RELATEDPOSTS Norelatedposts. COVID-19 ProjectEngineerhascollaboratedtoprovidethelatestcovid-19statsandpreventionmethods.Staysafe!CheckRealTimeUpdates Quicklinks Certification RecentPosts ProjectQualityControl TheCostofQuality PMIProjectKnowledgeAreas,Intro 4CorePartsofaQualityManagementPlan PMIProjectKnowledgeAreas,Video1:ProjectIntegration WhatisaProjectDeliverable? HowtoCreateaProjectTaskList HowtoWriteaScheduleManagementPlan PartsofaRiskManagementPlan FINDITHERE SubscibetoProjectEngineer.NETchannel–YouTube SubscribetoProjectEngineer.NET Skiptotoolbar AboutWordPress WordPress.org Documentation SupportForums Feedback LogIn Search