Uncertainty Estimates for Theoretical Atomic and Molecular Data
  Sources of uncertainty are reviewed for calculated atomic and molecular data that are important for plasma modeling: atomic and molecular structure and cross sections for electron-atom, electron-molecule, and heavy particle collisions. We concentrate on model uncertainties due to approximations to the fundamental many-body quantum mechanical equations and we aim to provide guidelines to estimate uncertainties as a routine part of computations of data for structure and scattering. 
H.-K. Chung, B.J. Braams, K. Bartschat, A.G. Csaszar, G.W.F. Drake, T.   Kirchner, V. Kokoouline and J. Tennyson
physics.atom-ph