The provided content discusses the effectiveness of a training and development program implemented by Sainsbury to improve employee performance. The program aimed at enhancing work performance, productivity, and supplement activity related to grocery items. The results show that 45% of managers reported high satisfaction with production and supplement activity, while 40% experienced normal improvement. The remaining 15% analyzed the same position in terms of quality work, sales, and operation management. The study concluded that the training program was effective in improving employee performance and retail industry effectiveness. It is recommended to identify employees' comfort zones and suitable training techniques to develop their work performance.