Multiple stages of document status

Question

Hello, I have following scenario:
In theory
When person A creates documents and put it in the library, he should be in status X. Person B can change it's status to Y or reject it. When the document is in status Y, person C can change it's status to Z, etc.
Everybody can see all of documents in library but there must be hierarchy that determinates who can change into higher status. Also, when document is in status Z, only person C can change it.
In my company that should look like this:
One user upload a document to a library it automaticly gets "upload complete" status. User x sees it and after examination of it, he set "checked" status to that document. After that, user y examinate that same documents and put "for
paid" status on it. At the end, user w (director) examinate it and give that document "paid" status.
Ofc, director should be able to see documents in all of these status, and change their status.
I tried to create additional column il library with choices (rejected, upload complete, checked, for paid, paid), but cannot set security to it so that user x can set only "checked" status.
Also i tried to create workflow, but it doesn't seem to work:
If Current Item:Status is empty value
Set Status to upload complete
Start a task process with Kamgrad Approvers LV1. (Task outcome to Variable: Outcome )
If Variable: Outcome equals Approved
Set Status to checked
Else
Set Status to rejected
If Current Item:Status equals (ignoring case) checked
Start a task process with Kamgrad Approvers LV 2 (Task outcome to Variable: Outcome1 )
If Variable: Outcome1 equals Approved
Set Status to for paid
Else
Set Status to Rejected
If Current Item:Status equals (ignoring case) for paid
Start a task process with Kamgrad Approvers Lv 3 (Task outcome to Variable: Outcome2 )
If Variable: Outcome2 equals Approved
Set Status to Paid
Else
Set Status to Rejected
Any suggestions?

Answer 1

Take a look at this article
http://office.microsoft.com/en-us/windows-sharepoint-services-help/connect-data-in-web-parts-HA010024105.aspx
You would make a list that connected to the other lists, pulling in the relevant data.  The only thing you need is one common column between all the lists.  If that single column were say "title", you would have the status for all three lists show
based on the same title.....
Lookups allow you to pull in the columns of other lilsts.  So if I had a list with two columns
Title, ID
And I made another list look at that list, I would specify the column "Title", and could pick from all the titles available in that list.  Those are what you would use on the other three lists.  You would use the web part connectors to provide
you a visual combination of them all.