  Multiplicity fluctuations are studied both globaly (in terms of high-order
moments) and locally (in terms of small phase-space intervals). The ratio of
cumulant factorial to factorial moments of the charged-particle multiplicity
distribution shows a quasi-oscillatory behaviour similar to that predicted by
the NNLLA of perturbative QCD. However, an analysis of the sub-jet multiplicity
distribution at perturbative scales shows that these oscillations cannot be
related to the NNLLA prediction. We investigate how it is possible to reproduce
the oscillations within the framework of Monte-Carlo models. Furthermore, local
multiplicity fluctuations in angular phase-space intervals are compared with
Monte-Carlo models and with first-order QCD predictions. While JETSET
reproduces the experimental data very well, the predictions of the Double
Leading Log Approximations and estimates obtained in Modified Leading Log
Approximations deviate significantly from the data.
