The objectives for the study are the causes seeking and studying the critical level of problems for the construction project within the Rattanakosin Technology University; Salaya together with proposing the solution and the prevention as the guidance to manipulate the construction project within the university which may help to reduce the delaying problems. The study would use the data from questionnaires and the interview forms for the construction manager engineer foreman contractor and construction project committee who are working for the 14 constructing projects within the university. As for the data analysis the researchers would compare the critical levels and the frequency of each cause of the delay. The results showed that the Problem causes delays construction occurring in Rattanakosin Technology University; Salaya by simply selecting the S.I. 1 in 3 sequence ที่most valuable of each factor the resulting delays in construction divided into four main topics below 1. Man : of 6 factors the total number of 18 factors 2. Material : of 6 factors the total number of 18 factors 3. Machine : of 5 factors the total number of 18 factors 4. Method : of 6 factors the total number of 18 factors

The purpose of this research was to construct experimental learning kit on sound velocity finding by resonance method in order to use for a material in Physics Laboratory I. The instruments used in this study included : 1) an experimental learning kit on sound velocity finding by resonance method with the experimental manual and the record forms 2) the pre-studying and the post-studying forms and 3) the questionnaires about students satisfaction in using the kit. The samples consisted of 32 first year students studying in the faculty of Engineering and Architecture. The results showed that the post-test have the higher significant than the pre-test score at level of 0.05. It was found that the sound velocity from both the theoretical and the experimental framework did not significantly different at the level of 0.05. The end correction by experiment higher significant than by calculation at level of 0.01 and students were highly satisfied in using the invented kit.

The purposes of this study were 1) to create a construction of design program for practical skills system of engine repairing 2) to determine the quality of design program for practical skills system of engine repairing 3) to evaluate the users’ satisfaction of a design program for practical skills system of engine repairing. The sample used in this study consisted of 30 lecturers from automotive division university and 39 lecturers from the office of vocational education commission. The tools used in this study were the quality assessment for practical skills system of engine repairing and the satisfaction assessment of the users to design program for practical skills system of engine repairing. The statistics used for data analysis were percentage mean standard deviation and t-test for dependent samples. The results of the study were as follows: 1) the quality of were very good level design program of for practical skills system of engine repairing( = 4.70 S.D. = 0.21). 2) User’s satisfaction level after accessing the program were very good level ( = 4.60 S.D. = 0.11). 3) The results were compared to assess the satisfaction level of the user from Nakhonphanom university and the office of vocational education commission towards of design program for practical skills system of engine repairing in the field of design content and application found that in each of the satisfaction level did not differ significantly at .05 level. 4) The results were compared to assess the satisfaction level of industrial community education and technical college towards of design program for practical skills system of engine repairing in the field of design content and the application found that in each of the satisfaction level did not difference at significance level .05

This research aims to construct and evaluate efficiency of experiment set for work-piece analysis based on variety of cutting edge parameters of punch-die. The parameters included clearance punch shape and inclination of punch edge that related to cutting force error in diameter and deformation of work-piece. The developed experimental set was evaluated by 15 experts using 5-point scale questionnaire which was divided into two parts: content and worksheet and experiment set design. The efficiency evaluation was done by using the experiment set to teach a sample group of 15 students. Results showed that quality of the proposed experiment set was in the highest level with average score of 4.65 (SD = 0.47). The efficiency evaluation by teaching a sample student group revealed that the efficiency was 85.43/84.00 which was higher than the criteria of 80/80 in research hypothesis. Therefore it can be concluded that the constructed experiment set could be used to enhance students’ analytical thinking in punch-die work.

The purpose of this research is to study the effect of a safety system provided for external wall plastering activity on productivity by studying a construction of commercial buildings. The safety system composed of (1) stable scaffolding system (2) providing clean and not slip walkways on the scaffold (3) installation of handrails not less than 0.90 meters in height along sides of the scaffold (4) installing safety nets around outside perimeters of the scaffolding (5) indicating working area (6) installing stairs (7) providing protection for people who works below (8) providing tools and equipments for transporting material which are safe and ready for using and (9) providing personal protective equipment for workers. Cost of the safety system is 79665 baht for a wall area of 1510 m2 or approximately 53 baht/m2. The prevention cost is quite high because it is an initial investment cost. However contractors could repeat theirs used on future projects. Productivity rates for prior and after the used of safety system are 1.16 and 1.13 m2/person/hr respectively. The productivity declines for approximately 3%. In addition our study found an impact of predecessor activity which is a brick laying activity. If brick walls are not well aligned and plumbed the working time for wall plastering could take longer for 8%. Meanwhile the wall plastering productivity could decrease for 11% and labor cost could increase for 12%.