 By 1913, the company had developed all of the basic techniques of the assembly line and mass production.Ford introduced the world's first moving assembly line that year, which reduced chassis assembly time from hours in October to 2 hours 40 minutes (and ultimately 1 hour 33 minutes), and boosted annual output to 202,667 units that year After a Ford ad promised profit-sharing if sales hit 300,000 between August 1914 and August 1915, sales in 1914 reached 308,162, and 501,462 in 1915; by 1920, production would exceed one million a year.These innovations were hard on employees, and turnover of workers was very high, while increased productivity reduced labor demand.