a analysis of machine productivity

1. CEB ASSIGNMENT
ABIN BABU
ANAND PREMNATH
AJAS SUNIL

2. • Concrete required -5000CuM
• Time -25 months,12.5 months ,5 months
• Plants owned by company
• 30 M3 batching plant -4 no's
• 60 M3 batching plant -1 no's
• 120 M3 batching plant -1 no's
• Calculate combinations of batching plants to be operated?
• Transit mixers and no's?

4. COMBINATIONS
months 25 months 12.5 months 5 months
Total concrete required 50000 50000 50000
Concrete
required/month on
average(M3)
2000 4000 10000
Assuming 20 days of delivery
Concrete required
/day(M3)
100 200 500
Combinations 1)operating 120 m3 plant at
plant at lesser efficiency
2)operating 60 m3 at
optimum efficiency along
with one 30 m3 plant in
little higher efficiency
1)operating 120 m3 & 60 m3
60 m3 plant at optimum
efficiency and one 30 m3
1)maximum optimum
production possible /day
/day 300 m3.
Have to arrange externally
externally
200 m3

5. TRANSIT MIXERS
Months 25 months 12.5 months 5 months
Total concrete required 50000 50000 50000
Concrete
required/month on
average(m3)
2000 4000 10000
Assuming 20 days of delivery
Concrete required
/day(m3)
100 200 500
Assume batching plant is 5 km away .1 cycle time =45 min. Using transit mixers of 8 CuY
which is most popular (8yd³= 6.116439m³)
No of transit mixers 2 4 10
Efficiency of working assumed is 85%.Mixing speed 8-12 rpm