Beyond the purely ludic and mathematical aspects of sudoku, this code demonstrates how to set up dimensions, cubes, views, cell formating, security at elements and cells levels all through Turbo Integrator in just one process.

Locking cubes is a good way to insure your (meta)data is not tampered with.
Right click on the cube you wish to lock, then select Security->Lock.
This now protects the cube contents from TI process and (un)intentional admins' changes.
However, this makes updating your (meta)data more time consuming, as you need to remove the lock prior to updating the cube.

Large nested rollups can lead to elements being counted twice or more within a rollup.
The following process helps you to find, across all dimensions of your system, all rollups that contain elements consolidated more than once under the rollup.

The code isn't the cleanest and there are probably better methods to achieve the same result so don't hesitate to edit the page or comment.

It proceeds like this:

TM1 chore scheduling is frequency based, i.e. it will run and try to pull data after a predefined period of time regardless of the availability of the data at the source. Unfortunately it can be a hit or miss and it can even become a maintenance issue when Daylight Saving Time come into play.

Changing a rule or process in TM1 does not show up in the logs.
That is fine as long as you are the only Power User able to tinker with these objects.
Unfortunately, it can get out of hand pretty quickly as more power users join the party and make changes that might impact other departments data.
So here goes a simple way to report changes.

The idea is to compare the current files on the production server with a backup from the previous day.

You will need:

A quick way to monitor users login/logout on your system is to log the STATUS value (i.e. ACTIVE or blank) from the }ClientProperties cube.

View->Display Control Objects
Cubes -rightclick- Security Assignments
browse down to the }ClientProperties cube and make sure the Logging box is checked
tm1server -rightclick- View Transaction Log
Select Cubes: }ClientProperties

Explore the structure of your TM1 system through the Skyrails 3D interface:

If you do not have flash, you can have a look at some screenshots
/!\ WARNING: your eyeballs may pop out!

This is basically the same as the previous work with graphviz, except this time it is pushed to 3D, animated and interactive.

I came across hierarchies holding a single child.
While creating a consolidation over only 1 element might make sense in some hierarchies, some people just use consolidations as an alternative to aliases.
Either they just don't know they exist or they come from an age when TM1 did not have aliases yet.

The following process will help you identify all the "single child" elements in your system.
This effectively loops through all elements of all dimensions of your system, so this could be reused to carry out other checks.