Just published a new article in my blog.
This article began with the simple question: why does the search query “camera lenses” lead to tripods in the Electronics SAP Hybris demo storefront instead of the camera lenses products? There is a relevant category named “camera lenses” and a product having “Lens” in its name. In the article, I explain all details of relevance score calculation and also show how to configure the hybris search module better. It will help you to better understand the search processes in hybris, be able to explain such cases to the customer, or fix the situations like mentioned above by changing the search configuration in the right way.
https://hybrismart.com/2017/07/13/explaining-sap-hybrissolr-relevance-ranking-for-phrase-queries/



