Assessment of the first level managers only in respect of their compliance with the requirements set for a particular job position isnot sufficient. A tool facilitating identification of the relevance of the first level managers in certain management chain is required asit would ensure effectiveness of their performance and harmony in the management chain. The present article aims at emphasisingthe feasibility of identification of the relevance of the first level managers in the management chain (MLM–FLM–SUB) throughpersonality traits. The research analysed the following members (links) of the management chain: first level managers (FLM), theirdirect supervisors – mid-level managers (MLM) and subordinates (SUB) – working in five furniture manufacturing companies ofthe West Lithuania Region. “The Big Five” method was applied as research instrument to assess personality traits of the first levelmanagers. Quantitative analysis enabled modelling of a graph, which represents a derived mean value of the assessment of thefirst level managers’ personality traits, designated to identify disharmonious chains in companies. When identifying the first levelmanagers’ relevance in the management chain, only individual evaluations performed by the members /links of the chains werereferred to and used as a basis for evaluation of personal traits of particular first level manager only. The obtained data supplementsdirect indicators of FLM performance assessment.