Maintenance management remains a persistent challenge in Nigerian manufacturing, where reactive approaches dominate despite their well-documented inadequacies for achieving operational sustainability. This study examined the relationship between maintenance management dimensions (preventive, corrective, and predictive maintenance) and project sustainability indicators (cost control, minimal downtime, and asset lifespan) in manufacturing companies in Rivers State, Nigeria. A quantitative, cross-sectional survey design was employed, with data collected from 198 manufacturing companies using a structured questionnaire. Descriptive statistics, Pearson correlation, and multiple regression analysis were used to test the hypotheses. The findings revealed that preventive maintenance significantly positively affects cost control (β = 0.31), minimal downtime (β = 0.29), and asset lifespan (β = 0.27). Predictive maintenance demonstrated the strongest effects across all sustainability indicators (β = 0.47, 0.44, and 0.41, respectively). Corrective maintenance showed no significant relationship with any sustainability outcome. The study concludes that proactive maintenance strategies, particularly predictive maintenance, are essential for achieving project sustainability, while corrective maintenance delivers no measurable sustainability benefits. Theoretical contributions include empirical validation of the conceptual framework within the Rivers State manufacturing context. Practical implications advise manufacturing firms to prioritise investing in predictive maintenance technologies. Policy recommendations encourage regulatory incentives for proactive maintenance adoption. Limitations include the cross-sectional design and single-region focus.

This study examines how knowledge management affects Akwa Ibom State SMEs' work quality. The knowledge management aspects included in the study were knowledge creation and knowledge acquisition. Cross-sectional survey research was used for this study. The study's population included 9,483 SMEs registered in Akwa Ibom State. The sample size was 384 using the Krecjie and Morgan (1970) table. Data was collected with a standardized Likert scale questionnaire. Data was analyzed using descriptive and inferential statistics. The inferential statistics used a simple linear regression procedure. The study's results indicate that knowledge creation had an R-value of 0.571, but knowledge acquisition had an R-value of 0.406 concerning work quality. Thus, it was concluded that knowledge management significantly improves the quality of work produced by SMEs in Akwa Ibom State. Since knowledge creation is necessary to guarantee the promotion of competitive advantage in their operations, it was suggested at the conclusion that managers of SMEs should make sure that knowledge is created inside the company in order to improve performance. SMEs should also create policies that support knowledge management techniques. Through staff learning and training, their companies will be able to enhance their performance.

Interest rate is an important economic factor that can determine the level of investment in any economy, hence, the need for any organization or economy that wishes to grow to pay attention to it dynamism. This study was conducted to examine the effect of interest rate on the growth of insurance industry in Nigeria. Total insurance investment, and gross premium income which represents the insurance industry growth constitute the dependent variables while interest rate was the independent variable. The researcher employed a pooled ordinary least square (OLS) regression using secondary data drawn from audited annual financial statements of insurance industry in Nigeria from 2003-2023, a period of twenty-one years. The results show that interest rate (INTR) has significant effect on Total Insurance Investment (TII), while it has no significant effect on Gross Premium Income (GPI). It was concluded that there is a statistically significant of interest rate on total insurance investment, indicating that interest rate is very important in determining the growth of insurance companies in Nigeria. The second hypothesis shows insignificant effect of interest rate on the gross premium income of insurance, this could be attributed to low patronage of the insurance business, or by factors that enhanced premium collection such as compulsory insurances, among others. Therefore, it was recommended that premium income generated should be put into viable investment as it is not significantly influence by interest rate, this will help in increasing total insurance investment. Also, the government through the insurance regulatory authority should implement the compulsory insurance mechanism, to enables more patronage, while also mandating the insurance companies to follow the doctrine of interest rate set by the Central Bank of Nigeria (CBN) when pricing their products so as to avoid unfair, deceptive and abusive practices of overpriced policies which consequently affect the industry growth.