Table 3.

Monthly data of manufacturing industry during five years.

Date	Production quantity	Downtime (hours)	Defective
2019-01-31	2137	4.32	60
2019-02-28	4867	7.18	96
2020-01-31	1950	8.75	105
2020-02-29	1450	10.20	130
2021-01-31	3200	5.55	80
2021-02-28	3600	4.90	75
2022-01-31	4000	3.85	50
2022-02-28	4200	4.15	45
2023-01-31	4500	3.20	40
2023-02-28	4700	2.75	35