Appendix to the Guidelines for LCA: Electronic Component

LCI Data Calculation Manual
It is recommended in the guidelines that data allocation be used as the technique for collecting data for use in life cycle
inventory analysis (LCI analysis), which is the second phase of an LCA.
Conduct data allocation in accordance with ISO 14044, 4.3.4 using a parameter that is interrelated to theenvironmental impacts of the product, such as the product volume, weight, price, and the like, to arrive at data for one
unit of product.
A basic concept and an example of working procedure follow.

1. Concept
1-1. Concept of data allocation and calculation methods
The table below shows the concept of data allocation and sample calculation methods for unit product data.
Note that the calculation methods are not limited to those listed in the table.
Table - Concept of data allocation and sample calculation methods
Name
DescriptionNo.
Calculation
method 1
Calculation
method 2
Calculation
method 3
Calculation
method 4
Calculation
method 5
Calculation
method 6
Calculation
method 7

Proportion by productvolumeProportion by productweightConcept

Calculate using ratio by volume of product.

LCI data is proportional to volume.

Calculate using ratio by weight of product.

LCI data is proportional to weight.

Proportion by sales

Calculate using ratio of monetary amounts ofsales.

LCI data is proportional to the monetary amountof sales.

Proportion by cost

Calculate using ratio of costs.

LCI data is proportional to cost.

Proportion by raw material
Calculate using ratio of raw material costs.
cost
Proportion by process
Calculate using ratio of process floor areas.
area

LCI data is proportional to cost of raw materials.
LCI data is proportional to the area of themanufacturing process

LCI data on water, ancillary materials, wastewater,Calculate other items using proportion by energy. and wastes are reset to be in the same proportion
as that of energy.

Proportion by energy

1-2 Allocation, aggregation, and calculation of ratios
In allocating data, it may be required first to allocate plant data by the product group or to aggregate individual-product data into
product-group data, as an intermediate step.
In calculating LCI data, use the ratios of a desired parameter to convert plant data into data for one unit of product.
Given below is a sample of allocation to product groups, aggregation into a product group, and calculation by the proportion, which
are required in the process of allocation.

(1) Allocating plant data by, for example, sales for each product group
Allocate plant data by, for example, sales for each product group
Building

Product group (1)Product group (1) energy

Product group (2)Product group (2) energy

Product group (3)Product group (3) energy(For example)

Product group (1) sales
Product group (1) energy＝×

Plant sales-1-

Energy used by entire plant(2) Aggregating data by the productTo conduct LCI efficiently, select, out of volume, weight, price, etc. of product, a parameter that is interrelated to the environmental impact ofproduct.
Using the selected element as the standard, aggregate data by the product group to facilitate calculation.
(For example)
Product group

SubgroupAA

Product group (1)Size
１Aggregate by thesame volume.

2

Aggregate by thesame volume.

１

１44

4

1

1

3XX

Company

2V

3BB

Product group (2)Aggregate by thesame volume１

Aggregate by thesame volume.

2

2

2

Aggregate by thesame volume.

１

１443
Aggregate by thesame volume.

45YY

Aggregate by thesame volume.

12CCProduct group (3)Aggregate by thesame volume.

１Aggregate by thesame volume.

１１33

3

１１2ZZ

12

Aggregate by thesame volume3224(3) Calculating by the proportion
Obtain LCI data for one unit of product from the ratio of annually-produced quantity to the volume of product, etc(For example)

Volume of one unit of product

Energy for one unit

＝×

Energy used by the product group

Total volume of the quantity produced in one year.

-2-2. About the flow of calculation
The diagram below shows a sample calculation flow for data for one unit of product under these guidelines
This sample flow uses the volume as the basis for allocation.

STEP １

STEP ２

STEP ３

STEP ４

Studying plant data
Study one-year data for theentire plant (energy, water,wastewater, and wastes).

Studying quantity
produced
Study quantity producedin one year.

Allocating by the productgroup
Allocate total plant data toeach product group(energy, water, wastewater,and wastes)

Aggregating by the productgroup
Aggregate the components
having the main bodies of anequivalent volume.

STEP 5

STEP 6

STEP 7

Calculating the ratios
Calculate the ratios.

Calculating LCI data
(energy, water, ancillarymaterials, wastewater,and wastes)

Studying LCI data (raw materials)
Input raw material data.
If it is difficult to obtain data per
product, use data calculated fromthe table of constituents of theproduct and the yield rate at theprocess.

Calculate LCI data for
one unit of product.

Calculation
completed

3. Calculation method in detail
A specific procedure based on the foregoing calculation flow is illustrated below
This sample flow uses the volume as the basis for allocation.
STEP 1．Studying plant data
Obtain the energy, water, ancillary materials, wastewater and wastes for the entire plant.
INPUT
EnergyElectric power
Kerosene
Fuel oil
LPG
LNG
City gas
Water
Raw materials
Ceramic rawmaterials
NiCu
Sn
Solvents
Binder resins
Carrier film

OUTPUT
Unit
kWhL
L
kg
kg
Nm3
m3

20,000,000
200
100,000
50,0000
2,000
50,000

Plant Z

Unitkg
kg
kg
kg
kg
kg
kg

400,000
8,000,000
900,000

STEP 2． Studying the quantity produced
Study the quantity produced in a one year.

Product group

Subgroup

Product group (1) AA
Product group (1) AA
Product group (1) AA
Product group (1) AA
Product group (1) XXProduct group (1) XX
Product group (1) XX
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) YY
Product group (2) YY
Product group (3) CC
Product group (3) CC
Product group (3) CC
Product group (3) ZZ
Product group (3) ZZ
Product group (3) ZZ
Product group (3) ZZ

Item name
AA-1
AA-2
AA-3
AA-4
XX-1
XX-2
XX-3
BB-1
BB-2
BB-3
BB-4
BB-5
YY-1
YY-2
CC-1
CC-2
CC-3
ZZ-1
ZZ-2
ZZ-3
ZZ-4

Quantity
produced(1000, 000pcs)

10203040204060203040100
10020015033020220300200100100-3-

Wastewater

Unit

Wastewater

m3

Wastes

Unit

Industrial waste
discharges

kg

Discharge
50,000Discharge
100,000

STEP 3． Allocating by the product group
Study the product groups and the layout of production process to determine whether independent data for each producgroup can be extracted or not.
If no independent data can be extracted, accomplish allocation by using sales amounts, costs, raw materials, area ofthe production process, etc.
Bldg
A

Product group (2)Bldg
B

Product group (1)Product group (2)Bldg
C

Product group (1)Unit

EnergyWater
AncillarymaterialsWastewaterIndustrial
wastesElectrickWhpower
KeroseneL
Fuel oilL
LPGkg
LNG
kg
City gas
Nm3
Waterm3
Solventskg
Binder resins kg
Carrier film kg
Wastewater m3
Industrial
wastekgdischarge

Bldg
D(For example)
Calculation method for product groups group (1):Calculate Bldg. B by allocation, and add to Bldg. C.

Product group (3)Calculation method for product group (2):Calculate Bldg. B by allocation, and add to Bldg. A.
Bldg
ECalculation method for product group (3):
Add Bldg. D and Bldg. E.

Product group (3)Productgroup (1)ProductProductgroup (2) group (3)10,000,000

6,000,000

4,000,000 20,000,000

100
50,00025,0000
1,000
25,000200,000
4,000,000
450,000
25,00060
30,00015,0000600
15,000120,000
2,400,000
270,000
15,00040
20,00010,0000400
10,00080,0001,600,000
180,000
10,000200
100,000
50,0000
2,000
50,000400,000
8,000,000
900,000
50,00050,00030,00020,000100,000

Total

STEP 4． Aggregating by the product group
Aggregate those items into a product group, out of the items studied in Step 2, whose main component volumes are equivalent to one another.

Product group

Category

Product group (1) AAProduct group (1) AA
Product group (1) AA
Product group (1) AA
Product group (1) XX
Product group (1) XX
Product group (1) XX
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) BB
Product group (2) YY
Product group (2) YY
Product group (3) CC
Product group (3) CC
Product group (3) CC
Product group (3) ZZ
Product group (3) ZZ
Product group (3) ZZ
Product group (3) ZZ

Item name(1,000,000pcs)

Reasonforaggregation

Product group

10 －20 Same as AA-1
30 Same as AA-1
40 －20 Same as AA-1
40 －60 Same as XX-2
20 －30 Same as BB-1
40 Same as BB-1100 －100 Same as BB-4200
150330 －20 Same as CC-1
220
300
200
100100

AA-1
AA-2
AA-3
AA-4
XX-1
XX-2
XX-3
BB-1
BB-2
BB-3
BB-4
BB-5
YY-1
YY-2
CC-1
CC-2
CC-3
ZZ-1
ZZ-2
ZZ-3
ZZ-4

Before aggregation:

Quantity
produced

Aggregation group
name

Quantity
produced(1,000,000pcs)

Product group (1)Product group (2)Product group (3)(1)-1(1)-2(1)-380
40100

Product group (2)(2)-1440

Product group (2)(2)-2200

Product group (3)(3)-1650

Product group (3)(3)-2220

Product group (3)(3)-3400

21 items

After aggregation:

8 items

STEP 5. Calculating the proportions
Calculate the proportion of the product to the entire product group.

AA-1 Volume (one unit)
AA-1 Proportion (one unit) =(1)-1 Quantity produced × Volume ＋ (1)-2 Quantity produced × Volume ＋ (1)-3 Quantity produced × Volume

Product group

Group

Product group (1) (1)-1
Product group (1) (1)-2
Product group (1) (1)-3Quantity
Volumeproduced(1,000,000 (mm 3/piece)
pcs)
80
2.240
2.6
100
3.0

Total
volume(mm 3)

Proportionof one unit

1.76E+08
1.04E+08
3.00E+08
5.80E+08

3.79E-09
4.48E-095.17E-09

Product group (2) (2)-1
Product group (2) (2)-2440
200817

3.52E+09
3.40E+09
6.92E+09

1.16E-09
2.46E-09

Product group (3) (3)-1
Product group (3) (3)-2Product group (3) (3)-3650
2204001215207.80E+09
3.30E+09
8.00E+09
1.91E+10

6.28E-10
7.85E-10
1.05E-09-4-STEP6 ． Calculating LCI data (Energy, water, ancillary materials, wastewater, wastes)
Calculate LCI data (energy) for one unit of product.using data of a product group obtained in Step 3 and the proportion obtained in Step 6,(For example)
Electric power consumption for one unit of AA-1:= Electric power consumption for the product group×
Proportion for AA-1 one unit=
10,000,000×3.79E-09=
3.79E-02
Unit
Electric powerkWh
KeroseneL
Fuel oilL
EnergyLPGkg
LNG
kg
City gas
Nm3
Water
Water
m3
Solventskg
Ancillary materia Binder resins kg
Carrier film kg
Wastewater
Wastewater m3
Industrial
Industrial
wastekg
wastesdischarge

3.79E-02
3.79E-07
1.90E-04
9.48E-05
0.00E+00
3.79E-06
9.48E-05
7.59E-04
1.52E-02
1.71E-03
9.48E-05
1.90E-04

STEP 7． Studying LCI data (raw materials)
The raw materials are specific to each product group. Raw material data is not suitable for allocation out of the entire plant data.
Acquire raw material data independently of all other items.
Use one of the following methods to enter the raw material consumption for one unit of product:
Obtain a standard consumption rate for one unit of product from cost from cost accounting records,
Method 1:
Use the method in Step 6 to allocate the raw materials consumed by the product group to obtain theMethod 2:
consumption for one unit of product.
If the consumption cannot be obtained in either of the foregoing methods, use the amounts of theMethod 3:
constituent components as the amounts of raw materials consumed.
Raw material
Ceramic raw
material
Ni
Cu
SnUnitkg

1.80E-04kg
kg
kg

2.30E-03
1.50E-04
1.40E-04

Completing the final data
Combine data from Step 6 and Step 7 to complete the data.

(For Example)
INPUT
EnergyElectric power
Kerosene
Fuel oil
LPG
LNG
City gas
Water
Raw material
Ceramic raw
material
NiCu
SnSolvents
Binder resins
Carrier film

Completed final data for Product AA-1
OUTPUT

UnitkWhLLkg
kg
Nm3
m3

3.79E-02
3.79E-07
1.90E-04
9.48E-05
0.00E+00
3.79E-06
9.48E-05

Unitkg

1.80E-04

kg
kg
kg
kg
kg
kg

2.30E-03
1.50E-04
1.40E-04
7.59E-04
1.52E-02
1.71E-03

For unit piece of AA-1
in Product group (1)-5-Wastewater

Unit

Wastewater

m3

WastesIndustrial waste
discharge

Unit
kg

Discharge
9.48E-05
Discharge
1.90E-04

(Reference Material 1) Calculation method proportion by volume when the components vary in shapes(1) Lead wire
If the lead-wire length is the only item that varies, use only the main-body volume to calculate the proportion by volume.

Product
ProductX-1
X-2

ProductX-3

Product
ProductY-1
Y-2

ProductY-3

Product X-1
Product X-2
Product X-3
Product Y-1
Product Y-2
Product Y-3

Quantity
produced

Quantity
produced(1,000,000pcs/year)(1,000,000pcs/year)

1040
100
103060

Product X
Product Y

150
100

Aggregate(2) Shape of main body
If the shape of main body varies, decide on, and use an apparent volume to calculate the proportion by volume.

Product L
Product M

Product N

Product O

Product Q
Product P

Product L
Product M
Product N
Product O
Product P
Product Q

Quantityproduced

Quantity
produced(1,000,000pcs/year)(1,000,000pcs/year)

205060103060

Product X
Product Y

130100Aggregate< End >

-6-