Protected: sothea Active 5 years ago Topics: 3Replies: 1☆ ProfileForums Topics StartedReplies CreatedEngagements Forum Replies Created Viewing 1 post (of 1 total) Author Posts May 22, 2014 at 2:00 pm #170111 sotheaMember Topics: 3Replies: 1☆ Sorry! 1. I wanted to mean: Envir. protection cost, detection cost, internal failure cost and external failure cost. Please clarify me again. Thanks! Author Posts Viewing 1 post (of 1 total)