Hungry Jills (Ws) makes and delivers burgers for the takeaway market. Its home delivery service is a source of competitive advantage for the company, as most other fast food burger restaurants cater to the takeaway market but do not offer home delivery. Because speedy, reliable delivery is a critical success factor for HJs, the company measures its customer response time on all deliveries. At the beginning of the year, HJs advertised that 50 percent of orders would be delivered in 15 minutes and 95 percent within 30 minutes. The following data relate to the first quarter of the year:

Required:
1. Analyse the above data to determine if HJs achieved its advertised delivery reliability per each month?
2. Did the company's delivery performance improve over the quarter?
3. Suggest ways in which HJs could improve its delivery performance.

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Time from receipt of order to delivery Orders delivered within 15 minutes January February March Total 1200 1200 1300 3700 Orders delivered between 16 and 30 minutes 2900 1200 800 900 Orders delivered between 31 and 45 minutes 900 200 400 300 Total orders 2600 7500 2400 2500