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Using the US EPA Data Quality Matrix in openLCA

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RECOMMENDED: Use the FLCAC Starter Database

You may simply use the Federal LCA Commons (FLCAC) Starter Database that already contains the Matrix and updated FLCAC repo data folder structures and move to STEP 4: Selecting Process Indicators.

Simply, navigate to the Federal LCA Commons Collaboration Server. Select the Federal_LCA_Commons group and the Fed_Commons_Core_Database repo. Download the repository as JSON-LD files and import into an empty database in openLCA.

See the USLCI Data Submission Guidelines: Syncing to FLCAC for complete instructions on how to use the FLCAC Starter Database and sync FLCAC repo data.

ALTERNATIVELY: Manual Download & Import

Alternatively, you may download the US EPA Data Quality Matrix directly from the openLCA Downloads page. You may choose this procedure if you are not using the FLCAC Starter Database but you still want to use the EPA Data Quality system in an openLCA database.



DESIGNATING THE MATRIX INSIDE EACH PROCESS

  • Next, open your process of interest and on the first "General Information" tab, you may scroll down to the "Data quality" section and "Process schema" field. There is a drop-down menu and the "US EPA – Process Pedigree Matrix" should now be an option you may select.
  • You will also want to go to the "Flow schema" field just below and select "US EPA – Flow Pedigree Matrix" from its drop-down menu such that you can elect data quality indicators at both the process and flow levels.

Designating the US EPA Process Pedigree Matrix

Designating the US EPA Flow Pedigree Matrix


SELECTING PROCESS INDICATORS

Now, at the "Data quality entry" field, you may select the "not specified" hyperlink (still on the first "General information" tab in the "Data quality" section). You should now be able click on matrix cells to select entries for "Process Review" and "Process Completeness" data quality indicators.

Designating the Data Quality Entry at Process Level

Selecting Process Indicator Matrix Cell Entries




SELECTING FLOW INDICATORS

You may now go to the "Data quality entry" column of any input or output flow on the "Inputs/Outputs" tab to select entries for the following data quality categories:

  • Flow reliability
  • Temporal correlation
  • Geographical correlation
  • Technological correlation
  • Data collection methods

Selecting Flow Indicators



US EPA Guidance for Selecting Indicators

For guidance on selecting process- and flow-level indicators for your life cycle inventory (LCI) data, please see the U.S. Environmental Protection Agency (EPA) Guidance on Data Quality Assessment for Life Cycle Inventory Data

If you need to cite the EPA Data Quality Guidance document, use the following citation:

Edelen, A. AND W. Ingwersen. Guidance on Data Quality Assessment for Life Cycle Inventory Data. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-16/096, 2016.

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