Sets the RO header status by looking at the Quanitites on the Lines.

set-ro-status

List<inscor__Repair_Order__c> roToUpdate = new List<inscor__Repair_Order__c>();
for (inscor__Repair_Order__c ro : [SELECT Id, inscor__Status__c,
                                  (SELECT Id, Name,inscor__Quantity_Received__c,inscor__Quantity_to_Repair__c,
                                   inscor__Status__c
                                   FROM inscor__Repair_Order_Lines__r)
                                   FROM inscor__Repair_Order__c]) {
    Boolean received = true;
    Boolean inRepair = true;
    Boolean sentTo = true;
    for (inscor__Repair_Order_Line__c line : ro.inscor__Repair_Order_Lines__r) {
        if (line.inscor__Quantity_to_Repair__c > line.inscor__Quantity_Received__c) {
            received = false;
        }
        if (line.inscor__Quantity_Received__c == 0) {
            inRepair = false;
        }
        if (line.inscor__Quantity_to_Repair__c == 0) {
            sentTo = false;
        }
    }

    if (received == true) {
        ro.inscor__Status__c = 'Received - Complete';
    } else if (inRepair == true) {
        ro.inscor__Status__c = 'In Repair';
    } else if (sentTo == true) {
        ro.inscor__Status__c = 'In Progress';
    }
    roToUpdate.add(ro);
}

update roToUpdate;