A food factory producing canned beans, contains three production lines, each line has 10 machines. All the manufacturing machines are designed and set up to run 24/7 for full production and during high demand. Preventive/predictive maintenance is required a day per month as well as 3 days per year to maintain production requirements. Designed production rate is 3,600 cans per hour, while during the 2020 this rate has been decreased by 15% due to the low demand during COVID-19 issues. Because the lock down conditions there has been discrepancy in production leads to recall of 2,680,000 cans from the market after some complains from the customers. Calculate the Overall Equipment Effectiveness "OEE" for this factory? Mention 3 factors to improve the OEE/Efficiency