Recall the discussion of Open Source Code in Chapter 6. Is Open Source code more reliable than other code?

Is it possible to make a safety-critical system 100% reliable?

Are the maturity levels in the CMMI in part representative of how long a product has been on the market? For example, if a product is new, is it more likely to be in the first 3 levels of maturity, and if a product has been released for a long time and has undergone many upgrades, is it more likely to be in the Optimizing level? Can one organization be simultaneously in several levels, depending on the age of the product in question?