These statements are referencing something called the Pareto Principle, or the 80-20 rule. The principle basically states that a small ...ForumDonateLearntocode—free3,000-hourcurriculumAbbeyRennemeyerYoumayhaveheardsomeonesaythat20%ofyourclientsbringyou80%ofalltherevenueyou'llmake.Orthat20%ofthepeopleinxcountryhold80%ofthewealth.ThesestatementsarereferencingsomethingcalledtheParetoPrinciple,orthe80-20rule.Theprinciplebasicallystatesthatasmallpercentageofcausesareresponsibleforalargepercentageofresults.Let'sdiveinandlookattheParetoPrincipleanditsrelatedconceptsinabitmoredetail.WhatistheParetoPrinciple?Inthe1940s,anengineerandmanagementconsultantnamedJosephJurancameacrosstheworkofItalianeconomistVilfredoPareto.Paretohadnoticedthataround80%ofthelandinItalywasownedbyonly20%ofthepopulation.Juranobservedthatthispatternappliedtomanyareasofeconomics,business,math,andothersciences.Heappliedtheprincipletoissuesofqualitycontrol,notingthat80%ofproblemsinbusinessandmanufacturingcouldbeattributedtojust20%ofthecauses.JuranwastheonewhonamedtheParetoPrincipleanddescribeditspartsas"thevitalfewandthetrivialmany."Thisimpliesthatfewercauses/peopleareimportantandimpactfulwhilemanyoutcomesareaffectedbythosefewcauses.Funfactbeforewemoveon:thelegendisthatVilfredoParetofirstnoticedthisdistributioninhisgarden.Hesawthataround20%ofhispeaplantsproducedabout80%ofthefruit.That'swhatsupposedlygavehimtheideatoapplytheprinciplemorewidelytoeconomicsandwealthdistribution.SohowdoestheParetoPrinciplerelatetoProgramming?BugsquashingThisisallverywellandgood,youmightbethinking–butwhyshouldyoucareifyou'readeveloper?Well,the80/20rulealsoappliestovariousareasofprogrammingaswell.Thinkofitthisway:80%ofbugscanbesolvedbyfixingjust20%oftheproblemsthatcausebugs.Soinsteadoftacklingeachbugasitcomes,youshouldworktoidentifythebugsthatarecausingthemostissues.Whenyou'vefoundthosebugs,crushthem,andmost(around80%)ofyourproblemswillbesolved.ProductivityOnateam,somemembersarelikelytobemoreproductivethanothers.Somepowerthrough