Bank tellers have been replaced by atms, which provide consistent levels of service and are never late, sick, or in a bad mood, thus overcoming the _____ nature of services.
I believe the correct term to fill in the blank would be variable. This term describes something that is affected by changes. It means change. Bank counters cannot be open anytime thus one cannot do transactions or withdraw whenever they want. To solve this problem, ATMs where made.
