Principles of the NNM method applied in the analysis of process realisation

The author developed the presented Numerical Network Modelling method (NNM; Polish abbreviation NMS) for the purpose of mapping, analysing, planning, and controlling tasks in civil engineering. The NNM model has been constructed according to the “two-points” rule, i.e. a successor and a predecessor event limit the realisation of every activity on a directed graph that is represented by edges and a vertex. An incidence moment expresses a realisation progress level of processes appearing decisive for the event occurrence. The vertex is activated in a situation when an incidence moment value and a threshold value representing conditions indispensable for the event to occur are equal. An emission to an edge, going out from a vertex upon its activation, takes place only when the realisation of a corresponding process in a given simulation experiment is a certain random event (resulting from the probability of this event occurrence or from the conditions of a decisive emitter). Deterministic, stochastic receptors and emitters have been pointed out according to GERT, as well as decisive ones involving conditions to be individually declared. In the following text, a decisive receptor and emitter are described, and an example of how to utilise the NNM to appraise a realisation scheme of four civil engineering projects.