I am trying to understand a phrase on the reliawiki website : Link
Close to the end of the page there is a part talking about blocks with static reliability values. It says that:
A static block can be interpreted either as a block with a reliability value that is known only at a given time (but the block's entire distribution is unknown) or as a block with a probability of success that is constant with time
I do not understand how to interpret "probability of success that is constant with time". Does this phrase refer to a constant pdf or cdf? If the pfd is constant with time, the cdf is a increasing straight line. I can't imagine what the pdf of a constant cdf would be.
Thank you.