TY - RPRT TI - Advanced Statistical Methods in Spacecraft Flight Software Cost Estimation: Bayesian Regression and Nonlinear Principal Components Analysis to Support System Engineering in the Early Project Lifecycle AU - Johnson, James K. AU - Hihn, Jairus M. AU - Fleischer, Samuel R. PY - 2022 UR - https://ntrs.nasa.gov/citations/20230005757 ID - 20230005757 ER -