The more obvious ones relate directly to productivity. Indication that job performance is declining may include production decreases lower quality more accident and higher scrap or rejection rate. Any of these outcome might suggest that worker skill need to be find tune. Of course we are assuming that the employee performance decline is in no way rerate to lack of effort. Manager too must also recognize that a constantly evolving workplace may require training. Change impose on employee as result of job redesign or a technological breakthrough also require training.