The reliability of the generation and major transmission facilities are important factors in modern electric energy supply. These facilities form what is known as the bulk electricity system. An evaluation of these systems involves the composite analysis of the generation and transmission facilities and can be conducted using analytical techniques, Monte Carlo simulation or a combination of these methods. This paper is focused on considerations that arise when utilizing Monte Carlo simulation in composite system adequacy evaluation. Two test systems are utilized to illustrate solution convergence characteristics, the effect of load curtailment priority orders, common mode failures and the inclusion of substations and switching stations in composite system analysis.