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$?$