How to predict MTTF of CPU and o

I would like you help me to draw or graphic about MTBF. MTTR (Mean time to repair) is include on MTBF?

Suppose we're given a group of 1000 chips, In the laboratory test a technician make calculation of the MTBF for this component, and each functioning chip has a probability of 0.1 of failing on any given day, regardless of how many days it has already been functioning. This suggests that about 100 chips are likely to fail on the first day, leaving us with 900 functioning chips . On the second day we would again expect to lose about 0.1 of our functioning widgets, which represents 90 chips, leaving us with 810 and it's continues...
Clearly this is an exponential decay. In this situation we can say that a group of chips have CONSTANT failure rate of 0.1.
The "density function" f(t) for a continuous exponential distribution has the form:

f(t) = L exp(-L t)
and MTBF = 1/ L

Where L is the Failure Rate and t is the Mission Time.

Below you can appreciate the Failure Rate v/s Time and Failure Rate v/s Temperature graph that we perform with our Software:

MTTR is independent of MTBF, that is, if you want to know the MTBF parameter of certain component you don't need to know the MTTR of it.
But if you want to calculate the Availability of certain component or assembly you must know both.
The availability is defined as a measure of the degree to which an item is in operable and committable state at the start of a mission when the mission is called for at a random point in time.
From a design perspective we can perform this formula: Ai =