One Click LCA automatically checks your inputs for plausibility and too generic definitions. The checking results will be shown on the mapping page after you have imported the data to your design, an example is shown below.
Model Checker is also used by some of the plugins. For example, in the Revit plugin, the Results table has a column that shows all relevant warnings. In that case, the warnings are automatically generated when the user receives the calculated results in the plugin.
How do you use the Model Checker?
For the relevant plugins, Model Checker is used automatically, and the relevant warnings are generated automatically when the user tries to get the results.
1. Potential Issue: 'Error: Implausible thickness' – existing already, let it be
The error means that the marked material row has an untypical thickness compared to the chosen material type. This could indicate that a component that the mapping is not correct, for instance, a structure having steel studs is modelled as a solid geometry but mapped to a resource with solid steel resulting in implausible thickness for steel which is normally less than a few centimetres thick.
Recommended Action - 'Check or correct defined thickness'
Download the Excel and check the 'issues' tab. Once you have located rows with the error warning, check your data from the model to find out if the material actually is that thick or if it is, for instance, a structure with air holes or several materials modelled with solid thickness.
Suitable fixes can be chosen based on the results:
- If the material is not named correctly and is therefore mapped to the wrong kind of material you can fix the labelling either in Model or modify the Excel tab that contains all the materials and import the corrected data from the Excel
- If the material is non-solid or a structure (such as a 'window' with glazing, air, and frame) you can map it to a matching data set containing the structure. (Still, it might be a good idea to fix the label as in option a.) The materials with layers can be found in the tab called 'Constructions' or by structure names such as 'Window' or 'Drywall'
- If the thickness or quantity of the material does not seem to be correct you can correct it in the model or modify the Excel tab that contains all the materials and import the corrected data from the Excel
- Choose to decide later and handle the data on the Questionnaire page
2. Potential issue: 'Error: Unconventional CLASS'
These datasets have unconventional value in the CLASS column in the imported Excel file. If the user doesn’t take any action, all such data will still be imported and they will appear in the data input page, in the section “Other structures and materials”.
Recommended Action – 'Review material classes’
First, it should be noted that if you don’t take any action, relevant data will still be imported, but they will go to the section “Other structures and materials”.
If you want to achieve a more accurate import workflow, you have two options.
Firstly, during the import process, you can choose to “Review manually” the “Classify” step and adjust how imported CLASS options are matched with specific sections of the data input queries.
As an alternative, you can either edit the original Excel you uploaded (if you did the upload manually) or use “Download Excel” in the first page of the import process to access the imported file, and then edit the problematic CLASS options so that they match the options in One Click LCA’s own Excel template.
Another option would be to just import all data without any changes, and then move the relevant rows between different sections in the data input page.
3. Potential issue: 'Error: Unconventional unit'
These imported datasets have an unconventional input in the “QTY_TYPE” column. This column should include the quantity units for all inputs (eg M2, M3 etc.)
Recommended Action – ‘Review and correct material units’
For this issue, review and correct material units for the relevant rows in the imported Excel file (QTY_TYPE column). Appropriate values can be seen here.
4. Potential issue: 'Error: Other errors'
These datasets have some technical or encoding issue.
Recommended Action – ‘Verify highlighted datapoints’
When this error occurs, it can indicate an issue with problematic inputs for the specific row or a wider formatting issue for the file. Ensure column headings and inputs are aligned with One Click LCA’s requirements.
5. Potential issue: ‘Warning: Invalid quantity’
These datasets have problematic quantity input that can not be read by the platform.
Recommended Action – ‘Make sure quantity and unit are present and quantity contains only numeric values’
Ensure that the “QUANTITY” column inputs are populated correctly in the imported Excel file for the corresponding rows.
6. Potential Issue: 'Warning: Generic definitions' – existing already
The warning means that the material name in the model contains terms like “default” or that we could not find a material name. These kinds of labels cannot be used to map the data reliably to LCA datasets.
Recommended Action - 'Add more specific information about the materials or map data points manually'
Download the Excel and check the rows with errors from the tab “issues”. Once you have located to rows with the error warning check your data from the other Excel tab containing all model info or directly from the model to find out what the material actually is. Then you can either:
- Fix the label in the model
- Modify the Excel tab that contains all the materials and import the corrected data from the Excel
- Choose a suitable dataset for the data in the UI. Your choice will not be memorized but you’ll get your calculation done immediately.
7. Potential issue: ‘Warning: Composite materials’
These datasets can be multi-constituent materials with no layer structure. For such materials, it is recommended to ensure that materials are mapped to appropriate environmental profiles.
8. Potential issue: ‘Warning: Geometry errors’
These datasets have technical or other errors in the data
Recommended Action – ‘Verify highlighted datapoints’
Check the relevant rows in the imported Excel file and ensure they have the expected inputs. See requirements.
9. Informative note: ‘Non-material objects’
Objects signifying empty, air or comparable value. No action is needed for these elements. They are automatically removed.
10. Informative note: ‘Out of scope’
Not relevant for the chosen LCA tool. Filter settings can be adjusted if needed in the first step of the import process. No action is needed for these elements. They are automatically removed.
Potential Issue Informative note: 'Info: Unidentified data' – existing already
The info means that we could not find any mapping recommendations for your datasets based on previous mappings in One Click LCA. This is not an error but a normal situation that is caused by using a bit different labels in the model that we have seen before. All you need to do is map these data rows to some environmental datasets in One Click LCA. We’ll remember your choices and map them automatically next time.
Recommended Action - 'Map unidentified data manually'
Unidentified data simply means the naming or labelling of the material names has not been seen before by our import mapper. You will need to make choices for the 'unidentified' materials and save these. Upon saving it will store these mappings in our mapping database, and will assign these automatically once you upload materials with the same naming or labeling in the future.