TOPIC:

The current user (N) needs the previous user (N-1) to have completed the previous step (not necessarily adding an image, he could only fill in fields). It would make no sense to start the N step without completing the n-1 step.
Each task is no longer than a dozen step, so the chain is limited from the number of the step to perform. The user will make the form no longer editable in the last form step.
I've attached a non-binding basic idea (raw wireframe) of how this might work and an simple use case example with a 3 steps form.

Hi,

I started to collect some technical ideas around this.

I assume the red crosses from your mindmap in the top-right corners mean to be able to delete the images?

However, if you have a form already, then please export it in BF => Configuration => Create Package => Select the form (and only the form) and export.

Please zip the form and attach it with your next response.

I will pick it up and see where and how I can add the pieces you need to get this done.

Regards,
Markus

Hi Markus
your guess is correct, the red crosses are for deletion.
I haven’t started creating forms yet. Anyway this is a good opportunity to start making a rough prototype of forms to share. Breezing form allows you to prepare forms quickly but I need a couple of days to refine the previous wireframe and send you the attachment. We will be back soon and thanks again for your help.
Regards 
Stefano

alright, please update this topic once you'r done.

Hi, I attach a simple example of form that allows me to simulate loading and downloading files and adding data needed to perform two tasks (task 1 and task 2) divided in steps to be performed in sequence (you must have finished step n-1 first to make step n).
The first task involves the execution of steps 1, 2 and 4 . The second task involves the execution of steps 1,  3 and 4. In this example I defined three users (P, Q, R) to which I assigned the steps.
User P will need the information contained  in the section "Data needed to perform step 1" to perform the step1 of task1. User P will add later the information that describes the result of what has been done in step1 in the section "Data sets from step 1".
User Q willhave to wait for User P to finish his job and declare "I finished the job" (I think I will make readonly the fields of step 2 until the declaration of the end of step 1). User Q must be able to view and download the files and data entered by User P. The task 2 describes a similar case to the task1.
The parts that I don’t know how to do are the uploading and downloading files. In this form are the parts within the sections called "Data files needed to perform step X" and "Data sets from step X - Upload data file X". For these parts I added fields that describe the features that I would need. Note that files uploaded to a task should not be visible in other tasks, even if the user assigned to the task steps is the same in both cases.