There are different methods to increase the reliability of planning and management decisions in the large structures construction.

The article considers the main issues concerning planning or management decisions, including development of methods for assessing the probability of adopted plan and management decisions accomplishment, assessing the level of reliability with combined use of several methods, evaluation of effectiveness of decisions on organizational technological reliability in the construction of large and complex structures. Based on these issues, the following approaches to improve reliability are proposed: development methods of efficient work organization, creation of time and resources reserves, duplication of the most important inter-related works (work chains).

The article also discusses what additional costs are required to improve the organizational and technical reliability of the design decisions development and implementation and what positive economic results could be achieved.