I look for possible different and additional tools from those related only to adaptive behavior (Vineland etc.) or to support (SIS) or functional needs.
Tiziano Gomiero There is an interesting project in the municipality of Asker in Norway that is lead by Yvonne Milanes. Her open-access rapport (in Norwegian unfortunatly), claims that a group of people with intellectual disabilities have greatly increased their startup-energy and have learned to do new skills in their own homes through the use of touchscreen devices and example videos. Her clients often have skills put just as often lack way to utlize their skills. In relation to your question they have had goals or ambitions that the participants would get more active in their homes doing everyday shores. Whether or not the measuring tools have been perfect, the experiments have clearly shown that the every day actions that need to be done have increased greatly. This is not so difficult to register since we are talking about the difference between what has been done before compared to what is done now. I will be publishing an article in the Indian Journal of Career and Livelihood Planning by the end of February were I point to the success of Yvonne Milanes. The main concern in my article is the actual use of devices and how they can be use by people with intellectual disabilities that do not read or write.
Tiziano Gomiero This is a link to her project https://www.asker.kommune.no/helse-og-omsorg/bruk-av-ipad-som-styrings--og-motivasjonssystem/evalueringsrapport/ She probably speaks english like most Norwegian professionals. Her project rapport is about her clients using apps and videos to facilitate and motivate their behavior.
If you're looking for a validated tool to assess a person's strengths and weaknesses in life skills, I recommend the TAGG assessment, developed by University of Oklahoma: https://tagg.ou.edu/tagg/
If you're looking to assess specific skills for each step of a project, task analysis would be best, but that's not a validated tool, it's project specific.
If you're looking to assess autonomy/independence in general the AIR Self-Determination Scale is a validated tool.
These probably don't match exactly what you're looking for, but as far as I know there's no validated tool to evaluate skills for specific projects.
Thank you very much @Kjartan and @irina, we already use the task analysis for the specifc skills and others tools, we look for something else ... but we did not find anything in the literature.