Evaluation criteria for environmental aspects

First, why do we use evaluation criteria? To segment significant aspects from the non-significant aspects. Why? Because resources are scarce, we should focus our attention and resources on those aspects where we can get the most improvement leverage. There is no other reason for developing evaluation criteria. So, any criteria that help your organization doing that is acceptable. Some organizations start with simple criteria like gravity, frequency/probability and ability to control or influence and then, with time, evolve to include other criteria like economic outcomes.
So, if you are starting, I recommend a simple approach.

Please check this information below with more detailed answers:

• Environmental aspect identification and classification - https://advisera.com/14001academy/blog/2019/08/27/key-iso-14001-benefits-to-customers/nowledgebase/environmental-aspect-identification-and-classification/
• Catalogue of environmental aspects - https://advisera.com/14001academy/blog/2019/08/27/key-iso-14001-benefits-to-customers/nowledgebase/catalogue-of-environmental-aspects/
• ISO 14001 risks and opportunities vs. environmental aspects - https://advisera.com/14001academy/blog/2016/03/21/how-does-product-life-cycle-influence-environmental-aspects-according-to-iso-140012015/
• Free webinar - ISO 14001: Identification and evaluation of environmental aspects - https://advisera.com/14001academy/webinar/iso-14001-identification-and-evaluation-of-environmental-aspects-free-webinar-on-demand/
• ISO 14001 document template: Procedure for Identification and Evaluation of Environmental Aspects and Risks - https://advisera.com/14001academy/documentation/procedure-for-identification-and-evaluation-of-environmental-aspects/
• Enroll for free in this course – ISO 14001:2015 Lead Auditor Course - https://advisera.com/training/iso-14001-lead-auditor-course/
• Book – The ISO 14001:2015 Companion - https://advisera.com/books/the-iso-14001-2015-companion/