Tutorial: Creating Parameters in openLCA
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Parameters
useful for sensitivity analysis
useful for preliminary data: data can easily be changed at the end of a study
different input values can create different versions of the life cycle
parameters reduce the likelihood of calculation errors
parameters can be used instead of concrete values for inputs/outputs
Define parameters as simple values, formulas or complex functions
one parameter can refer to others -- dependent parameters; loops not allowed
parameters can overwrite each other
available on different levels i.e. process, product system, project, impact method, database
local and global parameters possible
the amount of parameters is theoretically unlimited
Parameter names…
… must be one word.
… cannot contain special characters.
… cannot have more than 255 characters.
Parameter formulas…
… can contain single values, simple equations, or complex functions including logical expressions
… do not contain units, so please add them in the comment field
… cannot have more than 255 characters.
...must use a point instead of commaas a decimal
To check formulas you can use the formula interpreter to find errors
To find out what constants, operators and functions are possible in openLCA, please see the document Parameter functions in openLCA: http://openlca.org/documents/14826/81...
To download this description as a pdf: http://openlca.org/documents/14826/4e...
Follow openLCA:
http://openlca.org
@openLCA
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To contact me directly: winter@greendelta.com or @SarahWWinter
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