Incorporating Variability in Lean Manufacturing: A Fuzzy Value Stream Mapping Approach

Table 7

Cycle time and WIP for future-state value stream map (2).

	Estimated value			TFN	NFN
	a	b	c
Raw material inventory (hours)	0	4	8	(−0.44, 4.00, 8.44)	(4.00, 1.33)
Cutting + prefitting (s)	41	50	61	(40.00, 50.00, 62.23)	(49.89, 2.48)
Supermarket no. 1 (hours)	0.5	1	1.5	(0.44, 1.00, 1.56)	(1.00, 0.17)
Computer + manual stitching (s)	570	620	680	(564.45, 620.00, 686.66)	(618.66, 12.86)
Assembly (s)	480	510	560	(476.67, 510.00, 565.56)	(510.58, 12.6)
Supermarket to shipping (hours)	0	4	8	(−0.44, 4.00, 8.44)	(4.00, 1.33)