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What is Extended Value Stream Mapping? - page 4 / 10

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Determining a Manageable Field of View The ideal map would truly show the whole. That is, it would start with the end customer who uses or consumes the product. The map would then follow the product all the way up the value stream to molecules in the ground (or in the recycling bin), showing all the wasted actions and information loss en route. However, just as trying to map all of a product’s parts back upstream is overwhelming, trying to see too far with your current vision may be fruitless. We advise novice mappers that a lot can be learned by looking one or two facilities and firms upstream from wherever you start. This is the minimum scope of extended mapping.

Single Facility Field of View — Learning to See

MRP

Daily

Weekly Schedule

Order

Michigan Steel Co.

500 ft coils

weekly fax

6-week Forecast

PRODUCTION CONTROL

90/60/30 day Forecasts

State Street Assembly

18,400 pcs/mo

  • 12,000 “L”

  • 6,400 “R”

Tray = 20 pieces 2 Shifts

Tues. + Thurs.

Daily Ship Schedule

1x Daily

C/T = 1 second C/O = 1 hour Uptime = 85% 27,600 sec. avail. EPE = 2 weeks

C/T = 39 seconds C/O = 10 minutes Uptime = 100% 2 Shifts 27,600 sec. avail.

C/T = 46 seconds C/O = 10 minutes Uptime = 80%

C/T = 62 seconds C/O = Ø Uptime = 100%

C/T = 40 seconds C/O = Ø Uptime = 100%

2 Shifts 27,600 sec. avail.

2 Shifts 27,600 sec. avail.

2 Shifts 27,600 sec. avail.

1600 L

1

1200 L

1

2700 L

850 R

640 R

1440 R

Production Lead Time

= 23.6 days

Processing Time

= 188 sec.

S. WELD #1

S. WELD #2

1

1100 L 600 R

1

4600 L 2400 R

5 days

1 second

7.6 days

ASSEMBLY #1

STAMPING

46 seconds

ASSEMBLY #2

SHIPPING

Staging

2.7 days

62 seconds

2 days

Coils 5 days

39 seconds

1.8 days

40 seconds

4.5 days

1

200 T

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