====Looking Backwards====

One key thing to keep in mind is that the lag correction classes only work **backwards**.

This is because you can easily reach 'now' when scanning forwards, meaning you need data from the //future// in order to synchronise your data.

To prevent this, you should always work in reverse - starting from the [[end asset|end asset]] and working backwards from there.

===Example===

If you have a production line that passes product from...

   A => B => C => D => E => F

...you should use 'F' as your [[end asset|end asset]]. All of your [[distance|distances]] that you'll use in calls to [[lcq_AddQuery|AddQuery]] will be relative to F.