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Updated 06/5/2023
3

Laundry clothes - example for PFM

Process Functional Modeling #

Process description:


Dirty clothes should be washed and ironed so we can wear them again.



The process operations:

  1. Load the clothes into the washing machine
  2. Wash the clothes
  3. Spin the clothes
  4. Rinse the clothes
  5. Spin the clothes
  6. Dry the clothes
  7. Iron the clothes

1 Inspection of clothes

3.4
0.6
OE 5.67

2 Loading clothes to WM

4
0.67
OE 6

3 Wash clothes

3.67
7.17
OE 0.51

4 Spin washed clothes

2.86
7.57
OE 0.38

5 Rinse washed clothes

4.2
6.4
OE 0.66

6 Spin rinsed clothes

3.4
6
OE 0.57

7 Unloading clothes from WM

2.67
1.33
OE 2

8 Dry rinsed clothes

3.2
7
OE 0.46

9 Iron washed and dried clothes

4.5
15.17
OE 0.3
Productive operations effectiveness

Effective

Ineffective

Operation types breakdown

Productive

Providing

Corrective

Metrology

Operation TypeDoes it increase cost?Does it increase product value?Recommendation
Productive
YesYesImprove
Providing
YesNoEliminate
Corrective
YesNoEliminate
Metrology
YesNoEliminate
OperationTypeMeritRecommendation
1 Inspection of clothes
Metrology
OE 5.67
Consider the necessity of the information and eliminate it when possible
2 Loading clothes to WM
Providing
OE 6
Consider eliminating
3 Wash clothes
Productive
OE 0.51
Consider improving
4 Spin washed clothes
Corrective
OE 0.38
Do nothing and eliminate it when possible
5 Rinse washed clothes
Corrective
OE 0.66
Do nothing and eliminate it when possible
6 Spin rinsed clothes
Corrective
OE 0.57
Do nothing and eliminate it when possible
7 Unloading clothes from WM
Providing
OE 2
Consider eliminating
8 Dry rinsed clothes
Corrective
OE 0.46
Do nothing and eliminate it when possible
9 Iron washed and dried clothes
Productive
OE 0.3
Consider improving

Total - 9 operations


Operation types:

Productive - 2 operations - 22%

Providing - 2 operations - 22%

Corrective - 4 operations - 44%

Metrology - 1 operation - 12%


To wet, contaminate, rinse, dry, and iron seems to be an unreasonable process.


Ironing operation shows the highest functionality. Why not use only ironing: Iron - contains all required features and performs all necessary functions: heating, wetting, straightening, etc. Why not add a washing function to the iron?


Think about how to modify IRON to use for clothes cleaning:



For instance, use two types of holes for water (steam) to clean the clothes and for suction to collect the water with dirt.


Add the pump to an Iron and use it for cleaning.




Jan 31 2023 12:38:27 pm
1 Inspection of clothes #
(by Process Functional Modeling)

Operation: Inspection of clothes

The purpose of the operation: to separate "white" clothes from "colored" clothes to avoid joint laundry and prevent "coloring" of the clothes

The product of the operation: Information

Functional rank
Problematic rank
Clothes
10
Person
8
Dirt
6
10
Light
6
Color
4

Metrology operations should be eliminated

Jan 31 2023 5:25:13 pm
2 Loading clothes to WM #
(by Process Functional Modeling)

Operation: Loading clothes into the washing machine (WM)

Purpose: Place the clothes into the chamber

Product: Clothes

Functional rank
Problematic rank
Light
10
Person
10
Detergents etc.
4
10
Jan 31 2023 4:52:02 pm
3 Wash clothes #
(by Process Functional Modeling)

Operation: Wash clothes

Purpose: Wash the loaded clothes with water and detergent to dissolve dirt

Product: Dirt

Functional rank
Problematic rank
Water
10
10
Solid dirt
4.4
Detergent
3.3
WM chamber
2.2
3
Clothes
2.2
3
Heater
2.2
Jan 31 2023 4:52:57 pm
4 Spin washed clothes #
(by Process Functional Modeling)

Operation: Spin Washed Clothes

Purpose: Remove the contaminated water together with detergent and dissolved dirt

Product: Water after wasing

Functional rank
Problematic rank
WM dram
10
10
Pump
5
Water
5
Clothes
2.5
Motor
2.5
Detergent
6.7
Dissolved dirt
3
Jan 31 2023 4:54:01 pm
5 Rinse washed clothes #
(by Process Functional Modeling)

Operation: Rinse washed clothes

Operation description: Add water and rinse the clothes

Purpose: to replace the washed water residue with pure water

Product: Pure water within clothes

Functional rank
Problematic rank
WM drum
10
5
Clothes
7.5
Water
7.5
10
Motor
1.3
Washing residue
5
Jan 31 2023 4:53:29 pm
6 Spin rinsed clothes #
(by Process Functional Modeling)

Operation: Spin Rinsed Clothes

Purpose: Remove the rinsing water from the clothes

Product: Water after rinsing

Functional rank
Problematic rank
Clothes
10
4.4
Water within clothes
5
WM drum
5
10
Motor
1.3
Detergent residue
2.2
Jan 31 2023 4:58:55 pm
7 Unloading clothes from WM #
(by Process Functional Modeling)

Operation: Unloading clothes into the washing machine (WM)

Purpose: Remove the clothes from the WM drum and prepare them for grying

Product: Wet clothes

Functional rank
Problematic rank
WM drum
10
Person
10
Rinsing water residue
10
Jan 31 2023 5:27:36 pm
8 Dry rinsed clothes #
(by Process Functional Modeling)

Operation: Dry rinsed clothes

Purpose: to dry the clean clothes after washing, rinsing, and spinning - remove moisture

Product: Water separated from clothes

Functional rank
Problematic rank
Clothes
10
10
Water
8
Drying drum
6
3.8
Air
6
2.9
Motor
2
Jan 31 2023 4:56:42 pm
9 Iron washed and dried clothes #
(by Process Functional Modeling)

Operation: Iron a washed and dried clothes

Purpose: Straighten the clothes one by one with iron

Product: Straightened clothes

Functional rank
Problematic rank
Person
10
Iron
7
10
Dried clothes
5
Steam
3
Water
2
Air
0.7
Jan 31 2023 4:57:52 pm
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