ISCHANGED(LRM__c)

ISCHANGED(LRM__c)

(Opportunity: StageName equals 02 - Scoping) and
(Opportunity: StageName equals 03 - Quoting) and
(Opportunity: StageName equals 04 - Solutioning & Deployment)

AND ISCHANGED(LRM__c)

(StageName : '02 - Scoping') ,
(StageName : '03 - Quoting') ,
(StageName : '04 - Solutioning & Deployment')

AND (
        ISCHANGED(LRM__c),
        OR (
             ISPICKVAL(StageName , '02 - Scoping') ,
             ISPICKVAL(StageName , '03 - Quoting') ,
             ISPICKVAL(StageName , '04 - Solutioning & Deployment')
           )
    )