com.umlet.element.base.Relation3303801906020;40;170;20com.umlet.element.base.Relation30046040140lt=<.20;20;20;120com.umlet.element.base.UseCase33048012040reorder materialscom.umlet.element.base.Relation26442011280lt=>. <<extend>>76;60;36;20com.umlet.element.base.Class140120340420Plumber Inc.com.umlet.element.base.Relation150280150320lt=<.130;20;20;300com.umlet.element.base.Note30058021090"reorder materials" extends "get materials". Only if there are too view materials they are reordered.com.umlet.element.base.Relation22026014070lt=<. <<include>>20;50;120;20com.umlet.element.base.Note7058021090"create invoice" includes "check creditability". So every time the boss creates the invoice he also checks the customers creditability.com.umlet.element.base.Actor54019067120Bosscom.umlet.element.base.Relation37022019012020;100;170;20com.umlet.element.base.UseCase23040012040get materialscom.umlet.element.base.UseCase31032012040instructcom.umlet.element.base.UseCase30024012040create invoicecom.umlet.element.base.UseCase17031012040check creditabilitycom.umlet.element.base.Relation40021015070lt=-130;20;20;50com.umlet.element.base.Relation3603401607020;20;140;50com.umlet.element.base.Relation2801902705020;30;250;20com.umlet.element.base.Actor51035047120Workercom.umlet.element.base.Note203019080Use case: Message exchange between actors without revealing the internals of the processes.com.umlet.element.base.Actor4022065120Customercom.umlet.element.base.Relation802001108020;60;90;20com.umlet.element.base.UseCase17019013050make emergency call