The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models . The analytical and approximation models have assumptions, which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is used as a case study. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities.

The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models . The analytical and approximation models have assumptions, which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is used as a case study. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities.

The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models . The analytical and approximation models have assumptions, which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is used as a case study. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities.

Modeling and simulation of production lines is considered to be important for designers who are interested in: Work-load Allocation Problem (WAP), Server Allocation Problem(SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes a real cement production line as a case study. A simulation model is developed by ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. Workstation failure data is collected along one year to obtain the machines failure behaviors. This paper searches for the optimum buffer sizes with the increase of the production rate. An actual cement production line is studied and analyzed by the simulation model from stem to stern. After a simulation replication time of 12 days,a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. To resolve the bottlenecks, a redesign of allocation of buffers which verify anoptimum size could be made and it might be taken into consideration when designers implement this line. Finally modified optimum workstations utilization, buffer capacities and the line production rate with an increase about more than 15% of the production rate and economizing of 34 % of buffer capacities. تعتبر النمذجة والمحاكاة لخطوط الإنتاج مهمة للمصممين المهتمين بمشكلة توزيع عبء العمل (WAP) ومشكلة تخصيص الخادم ((SAP ومشكلة تخصيص المخزن المؤقت (BAP). هذا البحث يدرس ويحلل خطاً موجوداً على أرض الواقع لإنتاج الأسمنت. ببناء نموذج محاكاة باستخدام أحد برامج المحاكاة (ARENA) يتم تحليل واختبار العديد من الاختناقات التي تتسبب في الازدحام الشديد في مناطق مختلفة على خط الإنتاج ويمكن حل جميع هذه الاختناقات. يتم جمع البيانات اللازمة للحصول على سلوك كل عطل من أعطال الماكينات على امتداد سنة كاملة. فى هذا البحث يتم الحصول على الأحجام المثلى للمخازن البينية مع زيادة معدل الإنتاج. بدراسة وتحليل خط الإنتاج من البداية للنهاية وتشغيل نموذج المحاكاة لمدة 12 يوماً تظهر نتائج محاكاة الاختناقات الموجودة بالخط وكذلك طبوغرافية محطات العمل وقدرات المخزن المؤقت ومعدل الإنتاج. يمكن أن يتم إعادة تصميم لحجم المخازن المؤقتة التي تحقق حجماً أمثل لحل الاختناقات، وقد تؤخذ هذه الاعتبارات عند مصممى مثل هذه الأنواع من الخطوط أو إجراء تعديلات على خط الإنتاج للاستفادة المثلى من محطات العمل وقدرات المخزن المؤقت. وأخيراً تم الحصول على زيادة فى الإنتاجية أكثر من 15% وترشيد 34 % من مساحة المخزن المؤقت.

Modeling and simulation of production lines is considered to be important for designers who are interested in: Work-load Allocation Problem (WAP), Server Allocation Problem(SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes a real cement production line as a case study. A simulation model is developed by ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. Workstation failure data is collected along one year to obtain the machines failure behaviors. This paper searches for the optimum buffer sizes with the increase of the production rate. An actual cement production line is studied and analyzed by the simulation model from stem to stern. After a simulation replication time of 12 days,a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. To resolve the bottlenecks, a redesign of allocation of buffers which verify anoptimum size could be made and it might be taken into consideration when designers implement this line. Finally modified optimum workstations utilization, buffer capacities and the line production rate with an increase about more than 15% of the production rate and economizing of 34 % of buffer capacities. تعتبر النمذجة والمحاكاة لخطوط الإنتاج مهمة للمصممين المهتمين بمشكلة توزيع عبء العمل (WAP) ومشكلة تخصيص الخادم ((SAP ومشكلة تخصيص المخزن المؤقت (BAP). هذا البحث يدرس ويحلل خطاً موجوداً على أرض الواقع لإنتاج الأسمنت. ببناء نموذج محاكاة باستخدام أحد برامج المحاكاة (ARENA) يتم تحليل واختبار العديد من الاختناقات التي تتسبب في الازدحام الشديد في مناطق مختلفة على خط الإنتاج ويمكن حل جميع هذه الاختناقات. يتم جمع البيانات اللازمة للحصول على سلوك كل عطل من أعطال الماكينات على امتداد سنة كاملة. فى هذا البحث يتم الحصول على الأحجام المثلى للمخازن البينية مع زيادة معدل الإنتاج. بدراسة وتحليل خط الإنتاج من البداية للنهاية وتشغيل نموذج المحاكاة لمدة 12 يوماً تظهر نتائج محاكاة الاختناقات الموجودة بالخط وكذلك طبوغرافية محطات العمل وقدرات المخزن المؤقت ومعدل الإنتاج. يمكن أن يتم إعادة تصميم لحجم المخازن المؤقتة التي تحقق حجماً أمثل لحل الاختناقات، وقد تؤخذ هذه الاعتبارات عند مصممى مثل هذه الأنواع من الخطوط أو إجراء تعديلات على خط الإنتاج للاستفادة المثلى من محطات العمل وقدرات المخزن المؤقت. وأخيراً تم الحصول على زيادة فى الإنتاجية أكثر من 15% وترشيد 34 % من مساحة المخزن المؤقت.

Modeling and simulation of production lines is considered to be important for designers who are interested in: Work-load Allocation Problem (WAP), Server Allocation Problem(SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes a real cement production line as a case study. A simulation model is developed by ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. Workstation failure data is collected along one year to obtain the machines failure behaviors. This paper searches for the optimum buffer sizes with the increase of the production rate. An actual cement production line is studied and analyzed by the simulation model from stem to stern. After a simulation replication time of 12 days,a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. To resolve the bottlenecks, a redesign of allocation of buffers which verify anoptimum size could be made and it might be taken into consideration when designers implement this line. Finally modified optimum workstations utilization, buffer capacities and the line production rate with an increase about more than 15% of the production rate and economizing of 34 % of buffer capacities. تعتبر النمذجة والمحاكاة لخطوط الإنتاج مهمة للمصممين المهتمين بمشكلة توزيع عبء العمل (WAP) ومشكلة تخصيص الخادم ((SAP ومشكلة تخصيص المخزن المؤقت (BAP). هذا البحث يدرس ويحلل خطاً موجوداً على أرض الواقع لإنتاج الأسمنت. ببناء نموذج محاكاة باستخدام أحد برامج المحاكاة (ARENA) يتم تحليل واختبار العديد من الاختناقات التي تتسبب في الازدحام الشديد في مناطق مختلفة على خط الإنتاج ويمكن حل جميع هذه الاختناقات. يتم جمع البيانات اللازمة للحصول على سلوك كل عطل من أعطال الماكينات على امتداد سنة كاملة. فى هذا البحث يتم الحصول على الأحجام المثلى للمخازن البينية مع زيادة معدل الإنتاج. بدراسة وتحليل خط الإنتاج من البداية للنهاية وتشغيل نموذج المحاكاة لمدة 12 يوماً تظهر نتائج محاكاة الاختناقات الموجودة بالخط وكذلك طبوغرافية محطات العمل وقدرات المخزن المؤقت ومعدل الإنتاج. يمكن أن يتم إعادة تصميم لحجم المخازن المؤقتة التي تحقق حجماً أمثل لحل الاختناقات، وقد تؤخذ هذه الاعتبارات عند مصممى مثل هذه الأنواع من الخطوط أو إجراء تعديلات على خط الإنتاج للاستفادة المثلى من محطات العمل وقدرات المخزن المؤقت. وأخيراً تم الحصول على زيادة فى الإنتاجية أكثر من 15% وترشيد 34 % من مساحة المخزن المؤقت.

A production line is an important class of manufacturing system when large quantities of identical or similar products are to be produced. The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models. The analytical and approximation models have assumptions which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is studied. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities

A production line is an important class of manufacturing system when large quantities of identical or similar products are to be produced. The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models. The analytical and approximation models have assumptions which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is studied. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities

A production line is an important class of manufacturing system when large quantities of identical or similar products are to be produced. The performance of a production line is highly influenced by machine failures. When a machine fails, it is then be unavailable during a certain amount of time required to repair it. Analysis of production lines divides into three types: analytical, approximation and simulation models. The analytical and approximation models have assumptions which make these models unrealistic such as reliable workstations, certain processing distribution, the first workstation cannot be starved and the last workstation cannot be blocked. The main problems in production lines treatment are the calculation of throughput and average levels of buffers because of the great size of state space. An analytical model is reviewed to clarify the limitations to use such treatment in real production lines. Simulation modeling of production lines is considered very important for designers interested in: Workload Allocation Problem (WAP), Server Allocation Problem (SAP), and Buffer Allocation Problem (BAP). This paper studies and analyzes the performance keys, which effect on production lines. A simulation model is developed by using ARENA software and used to analyze and test several bottlenecks that are causing severe congestions in different areas on the production line and could resolve all of these bottlenecks. In this paper, an actual cement production line is studied. After a simulation time of 13 days, a simulation results show the line bottlenecks, workstations utilization, buffer capacities and the line production rate. The outputs clarify redesign of allocation of buffers, which verify an optimum size could be made; it might be taken into consideration when designers implement such lines. Finally modified better workstations utilization, buffer capacities and the line production rate with an increase about 15% of the production rate and economizing of 37 % from buffer capacities

SOME PARAMETERS AFFECTING THE STATIC BEHAVIOR OF NORMAL STRENGTH RECTANGULAR R.C. SHORT COLUMNS CONFINED BY CFRP