FUNCTIONAL DESIGN AND EFFECTIVENESS OF CONSTRUCTION COMPANIES IN SOUTH-SOUTH REGION OF NIGERIA BY Urenna Nwagwu Department of Finance, Real Estate and Decision Sciences Wichita State University, Kansas City, USA and Uzoma Chukwuemeka Henry Department of Business Management, Imo State University, Owerri, Imo State, Nigeria ABSTRACT This study examined the relationship between functional design and effectiveness of construction companies in south-south region. The study adopted the survey research design. The population of this study is 195 employees of the 6 construction companies operating within the South-South region of Nigeria. A sample size of 131 was determined using the Taro Yamen formular. The Cronbach Alpha statistic was used to obtain a value of 0.70 as the instrument reliability ratio. The data set was first subjected to normality test for the residual term using the Jarque-Bera Statistic, but the result revealed that the normality assumption was not fulfilled; hence the introduction of nonparametric statistics (Spearman rank correlation and Theil-Sen regression) became imperative. The research questions were answered with Spearman rank correlation statistic so as to establish the relationship between the dependent and independent variables in the study. The hypotheses were tested with Theil-Sen regression technique so as to measure the “significance” of the degree of relationships existing between the dependent and independent variables. The analysis was enabled by the use of SPSS, RStudio and Eviews software packages. The results of the study showed that functional design have a moderate and very high significant relationship accordingly on quality service and timeliness of contract completion of construction companies in South-South region of Nigeria and as such the study recommends among others that management of construction firms should ensure that functional design is used as one of their organizational design tool as it enhances timeliness of contract completion. Keywords: Functional Design, Effectiveness, quality service delivery, timeliness, contract completion IJO -INTERNATIONAL JOURNAL OF BUSINESS MANAGEMENT ) ( ISSN 2811-2504 Volume 06 | Issue 01 | January 2023 | https://www.ijojournals.com/index.php/bm/index 1