Network-Based Material Requirements Planning (NBMRP) in Product Development Project

Projects are characterized by inefficient time utilization, downtimes and operational delays during the execution stage due to poor material supply programmes. To address the problems, this study evaluated the existing material planning practice, and formulated a NBMRP model out of the variables of the existing MRP and CPM models. Both primary and secondary data were used to test and apply the model to a product development project. The method of CPM was used for data analysis, and a heuristic method based on the logical sequence of critical activities was used for performance evaluation. The result of the analysis indicated that the model performed very well by coordinating the flow and usage rates of materials. Downtimes and operational delays were eliminated giving rise to 100% efficiency when all the research assumptions are taken into consideration. The study recommends in-depth feasibility analysis of materials with respect to availability, sustainability and uninterrupted scheduled flow throughout the project life cycle. Key Words: Material Requirements Planning, Lead time, Network Analysis, Critical Path, Heuristics

Common echocardiographic abnormalities in Nigerians of different age groups

Background: Transthoracic echocardiography (TTE) is one of the most commonly performed cardiac investigations. It can provide comprehensive information about cardiac structure and function, helping to establish a diagnosis and guide therapy, and it is no longer the preserve of the specialist cardiology department. Previous studies on echocardiographic findings in our environment had documented valvular heart disease, hypertensive heart disease and congenital heart diseases as the commonest echocardiographic findings in Nigerians.Aims: The study aimed to provide an update on the common echocardiographic findings in different age groups in this part of the world, since some of the previous similar studies were done over a decade ago.Materials and Methods: We reviewed the echocardiogram reports of 608 consecutive patients done from July 2009 to October 2011 at a private echocardiographic laboratory in Enugu, South-East Nigeria. Data was analyzed for age, gender and echocardiographic findings.Results: The age range of the patients was from 3 days to 98 years with a mean age of 46.4 ± 21.4 years. The mean age of the males was 47.6 ± 21.3 years, while the mean age of the females was 45.2 ± 21.1 years. The commonest echocardiographic abnormality in children was atrial septal defect, while rheumatic heart disease was the commonest in adolescents and young adults. Left ventricular diastolic dysfunction and degenerative valvular diseases respectively were the commonest in the middle-aged and elderly populations in this study.Conclusion: This study has reaffirmed rheumatic heart disease (predominantly mitral valve regurgitation) as the commonest cardiac abnormality in adolescents and young adults. Degenerative valvular diseases, left ventricular diastolic dysfunction, and atrial septal defects were the commonest abnormalities in the elderly, middle-aged population and children, respectively.Key words: Different age groups, echocardiographic abnormalities, Nigerian

Intra‑cardiac masses in adults: A review of echocardiogram records at two echocardiographic laboratories in Enugu, South‑East Nigeria

Background: Transthoracic echocardiography (TTE) is an excellent initial diagnostic technique used to evaluate and diagnose cardiac masses, even though transoesophageal echocardiography (TEE) provides superior image resolution and better visualization of cardiac masses, especially in patients with suboptimal transthoracic echocardiographic studies. TTE is the clinical procedure of choice for identification of left ventricular thrombi. TTE has greater than 90% sensitivity and greater than 85% specificity for detection of left ventricular thrombi and is probably superior to the sensitivity and specificity of TEE, especially for apical thrombi.Aims: The study aimed to identify the common types of cardiac masses and their commonest locations in the heart.Materials and Methods: We did a retrospective review of our echocardiogram reports from May 2003 to July 2012 to identify the frequency of intra‑cardiac masses in adults, as well as the gender distribution and commonest location of these masses.Results: There were 2,814 echo examinations in adults over this period, comprising 1,661 males (59.1%) and 1,153 females (40.9%). Intra‑cardiac masses were found in 20 of these patients representing 0.7% of the study population. Thrombi were the commonest masses noted in our study, and there were more masses in the atria than in the ventricles. The left heart chambers also had more masses than the right heart chambers. There was no sex difference in the frequency of cardiac masses.Conclusion: Intra‑cardiac masses are rare, and transthoracic echocardiography is still valuable in the diagnosis and initial characterization of cardiac masses.Keywords: Adults, echocardiography, intra‑cardiac masses, NigeriaNigerian Journal of Clinical Practice • Oct-Dec 2013 • Vol 16 • Issue

Simulation Study Of Small Scale Jobshop

This paper examines the impact of strategic change management on the performances of public transport in Osun State, Nigeria. It aimed at determining the role of leadership style in strategic change management; identify in factors that are influencing change process and actual performance of an organization. The study was carried out in the administrative seat of Osun State, Nigeria where, a sample size of 87 respondents was selected using multi-stage random sampling technique. The result of the study showed that, an effective strategic change processleads to a higher level of corporate performance; a strategic change process informed by effective leadership has positive effect on corporate performance and actual performance of an organization and the relationship is significant at 0.01 level. Journal of Research in National Development Vol. 3 (2) 2005: pp. 44-4