Please help us help you and fill where relevant:
Your LimeSurvey version: LimeSurvey Community Edition Version 6.2.4+230825
Own server or LimeSurvey hosting: own server
Survey theme/template: generic
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I have a survey subdivided in several question groups. Every group has some equation based questions that compute per-group scoring. At the end, there is a global scoring computation as well.
Many of the scoring equations depend not only on the group itself but also on questions in other groups.
My users ask to be able to complete single question groups and without any specific ordering. Something like today I'm going to compile Group 2. Tomorrow, after retrieving the required information, I'll compile Group 3. Group 1 and 4 ... we will see in the future.
Is there a URL that allows access to a single group? Is there a way to keep all the equation based answers (also those in other groups) updated when a user completes the group of choice?
I cannot split the survey in multiple surveys and keep the logic outside of Limesurvey.
I could try with having an all in one survey and manage the behaviour with javascript in my extended theme. Is there some other hint on how this could be done?

You may use the "Index".
 
But don't show the progress bar.
 

Oh ok, I know about the index.
The point is I need to "jump into" one such pages directly from outside. Sort of opening the survey with already one index item selected.
We even tried to use the move=X query-parameter but for some reasons whn we jump into a group all other answers of previous groups are removed. : - (