By Chao Wang, MS Candidate Department of Wood Science and Forest Products Virginia Tech What are Engineering Change Orders (ECOs)? ECOs are also called Engineering Change Notices (ECNs) or just Engineering Changes (ECs). ECOs are a significant driver of product development costs and lead time (Loch and Terwiesch 1999). Engineering changes (ECOs) refers to making design changes … Continue reading RESEARCH BRIEF: Engineering Change Orders (ECOs), an important engineering performance indicator