TY - GEN AU - Bock, Conrad AU - Feeney, Allison Barnard C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2013-04-01 04:04:00 DO - https://doi.org/10.6028/NIST.IR.7922 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2013 TI - Engineering Change Management Concepts for Systems Modeling: ER -