identification of spatial and temporal collisions,
which in turn leads to a reduction in construction time
and minimization of unplanned budget expenditures
(Bachurina, S., Sultanova, I., 2015; Bachurina, S.,
Sultanova, I., 2014; Department of Energy, 2004;
McGraw H Construction, 2012; Lapidus A.,
Avetisyan, R., Mirzakhanova, A., Kazaryan, R.,
2019; Talapov, V., 2010; Kolosova, E., Sukhachev,
K., 2011; Grachev, V., Klimov, Yu., Lim, V.,
Zakharov, P., Belyaev, A., 2006; Balakina, A.,
Simankina, T., Lukinov, V., 2018; Boton, C.,
Kubicki, S., Halin, G., 2011; Sultanova, I., 2015).
2 EFFICIENCY CRITERIA AND
RESTRICTIONS
Construction companies set themselves tasks, the
solution of which will make it possible to effectively
implement construction projects. The solution of the
assigned tasks is possible due to well-developed
organizational and technological solutions. An
obligatory criterion is the possession of deep and
extensive knowledge of the object under construction
(Bachurina, S., Sultanova, I., 2014; Department of
Energy, 2004). At present, during the construction of
objects, software systems are widely introduced into
the design process, which make it possible to model
the object being built in three-dimensional space
(3D). These software systems allow further
automation of receiving layout drawings. Each
correction that is made to the model is automatically
modified in the corresponding drawings. This method
significantly improves the quality of products
produced by the personnel, organizational and
technological solutions become well-developed,
which in turn minimizes the likelihood of collisions
in the area of joining spatial models. With the help of
automation and visualization, the probability of
spatial inconsistencies is reduced to 98% (Bachurina,
S., Sultanova, I., 2015; Bachurina, S., Sultanova, I.,
2014; Department of Energy, 2004). The advantages
of three-dimensional modelling are reflected at all
stages of the construction of an object, while the
development of 3D models at present can cost
significantly more than the well-known classical two-
dimensional drawings. However, the improvement in
the formation of new information systems for
modelling the organization of construction objects,
subject to the introduction of appropriate adjustments
and changes in the organizational and technological
processes, will reduce the cost of ongoing design
work by 5-10% (McGraw H Construction, 2012;
Lapidus A., Avetisyan, R., Mirzakhanova, A.,
Kazaryan, R., 2019). For the effective
implementation of projects, time-tested methods are
used:
1. The activity progress chart (APC) of a project
is a process model that reflects the sequence and
dependence of work performance. APC allows
calculating the most favourable way in terms of time
parameters, which allows effective performance of
the most complex works. APC is mainly used in the
construction of particularly complex and large
facilities with a large number of construction and
installation works. The critical path method is used in
the design of APC.
2. The critical path method makes it possible to
estimate the amount of full, private and free time
reserve that is available in each work. Work that is not
included in the critical path can be carried out in
stages - as appropriate, or even begin later, since it
does not affect the total duration of the construction
of the facility. The critical path method allows setting
the optimal time for completion of the construction of
a facility for a given budget.
3. The flow line method of organizing
construction work is a rational organization of labour.
A mandatory element in using the flow line method is
to minimize downtime and maximize resource
utilization.
The above methods have some limitations. For
example, APC may contain a large number of errors
related to the one-time use of space at a construction
site (different works in the schedule are independent).
This kind of situation at a construction site creates
certain time costs of individual teams due to the
impossibility of starting the performance of the
previous or subsequent work (Department of Energy,
2004; McGraw H Construction, 2012; Lapidus A.,
Avetisyan, R., Mirzakhanova, A., Kazaryan, R.,
2019). Synergy is achieved with the simultaneous use
of the above methods, when organizational and
technological decisions are made on the basis of a
visual model. The model is often referred to as 4D-,
5D-, 6D-, MULTI-D- modelling. Multidimensional
modelling combines a three-dimensional model of an
object under construction, 3D and APC (Talapov, V.,
2010; Kolosova, E., Sukhachev, K., 2011). The
economic and visual model (computer), which allows
the interconnection of construction processes
presented in three-dimensional space with reference
to time, makes it possible to make rational
organizational and technological decisions in the
design of construction organization project (COP),
work performance project (WPP), project of
organization of work (POW), clearly argue them for