The experimentally observed enhancement of number of close boson pairs in
e+e- collisions is reproduced by local weighting according to the quantum
mechanical prescriptions for production of identical bosons. The space-time
picture of the process, inherently present in the Lund fragmentation model, is
explicitly used. The model is used to check systematic errors in the W mass
measurements due to the Bose-Einstein effect. The possibility of direct
implementation of the Bose-Einstein effect into string fragmentation is
discussed.Comment: 26 pages, Latex, 17 figures in PS format attache
