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{
"metadata": {
"name": "",
"signature": "sha256:579288a5e0685252a970b36dc99c069cd7fb91e6e042c88d50d8eb0615ccf38d"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Elementary Economic Analysis"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.1 Page 16"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"#Part a \n",
"w1=1.2;#in Kg\n",
"c1=80.0;#cost of making aluminium casting in Rs/Kg\n",
"c2=150.0;#ost of machining aluminium casting per unit in Rs\n",
"\n",
"#calculation\n",
"Tc1=c1*w1+c2;#Total cost of jet engine part made of aluminium per unit in Rs\n",
"\n",
"#result\n",
"print \"Total cost of jet engine part made of aluminium per unit in Rs \",round(Tc1,3)\n",
"\n",
"#Part b \n",
"w2=1.35;#in Kg\n",
"c1=35.0;#in Rs/Kg\n",
"c2=170.0;#in Rs\n",
"c3=1300.0;#in Rs/Kg\n",
"\n",
"#calculation\n",
"Tc2=c1*w2+c2+c3*(w2-w1);#in Rs\n",
"\n",
"#result\n",
"print \"Total cost of jet engine part made of steel per unit in Rs : \",round(Tc2,3);\n",
"print \"DECISION : The total cost/unit of a jet engine part made of aluminium is less than that for an engine made of steel. Hence, aluminium is suggested for making jet engine part. The economic advantage of aluminium over steel per unit in Rs \",round(Tc2-Tc1,3)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Total cost of jet engine part made of aluminium per unit in Rs 246.0\n",
"Total cost of jet engine part made of steel per unit in Rs : 412.25\n",
"DECISION : The total cost/unit of a jet engine part made of aluminium is less than that for an engine made of steel. Hence, aluminium is suggested for making jet engine part. The economic advantage of aluminium over steel per unit in Rs 166.25\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.2, Page 17"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"#Part a \n",
"wood=0.1;#in m^3\n",
"WoodCost=12000.0;#in Rs/m^3\n",
"Table=1;#in units\n",
"TableTopCost=3000.0;#in Rs/unit\n",
"LegBushes=4.0;#units\n",
"LegBushesCost=10.0;#Rs/units\n",
"Nails=100.0;#in grams\n",
"NailsCost=300.0;#in Rs/Kg\n",
"TotalLabour=15.0;#in Hours\n",
"TotalLabourCost=50.0;#in Rs/Hours\n",
"\n",
"#calcualtion\n",
"WoodCostframelegs=WoodCost*wood;#in Rs\n",
"WoodTopCost=3000.0;#in Rs\n",
"BushesCost=LegBushesCost*LegBushes;#in Rs\n",
"NailsCost=Nails*NailsCost/1000;#in Rs\n",
"LabourCost=TotalLabourCost*TotalLabour;#in Rs\n",
"TotalCost1=WoodCostframelegs+WoodTopCost+BushesCost+NailsCost+LabourCost;#in Rs\n",
"\n",
"#result\n",
"print \"Cost of Table with wooden top in Rs \",round(TotalCost1,3)\n",
"\n",
"#given data for table with granite top\n",
"#Part b \n",
"wood=0.15;#in m^3\n",
"WoodCost=12000.0;#in Rs/m^3\n",
"Granite=1.62;#in m^2\n",
"GraniteCost=800.0;#in Rs/m^2\n",
"LegBushes=4.0;#units\n",
"LegBushesCost=25.0;#Rs/units\n",
"Nails=50.0;#in grams\n",
"NailsCost=300.0;#in Rs/Kg\n",
"TotalLabour=8.0;#in Hours\n",
"TotalLabourCost=50.0;#in Rs/Hours\n",
"\n",
"\n",
"WoodCostframelegs=WoodCost*wood;#in Rs\n",
"GraniteTopCost=Granite*GraniteCost;#in Rs\n",
"BushesCost=LegBushesCost*LegBushes;#in Rs\n",
"NailsCost=Nails*NailsCost/1000;#in Rs\n",
"LabourCost=TotalLabourCost*TotalLabour;#in Rs\n",
"TotalCost2=WoodCostframelegs+GraniteTopCost+BushesCost+NailsCost+LabourCost;#in Rs\n",
"\n",
"#result\n",
"print \"Cost of Table with Granite top in Rs \",round(TotalCost2,3);\n",
"print \"Economic advantage of table with granite top in Rs \",round(TotalCost1-TotalCost2,3)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Cost of Table with wooden top in Rs 5020.0\n",
"Cost of Table with Granite top in Rs 3611.0\n",
"Economic advantage of table with granite top in Rs 1409.0\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.3 Page 19"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"#design A\n",
"LatheCost=200.0;#in Rs/hour\n",
"grinderCost=150.0;#in Rs/hour\n",
"HoursOfLathe=16.0;#in hours/1000Unit\n",
"HoursOfGrinder=4.5;#in hours/1000Unit\n",
"\n",
"#calcualtion\n",
"TotalCostA=LatheCost*HoursOfLathe+grinderCost*HoursOfGrinder;#in Rs/1000unit\n",
"\n",
"#result\n",
"print \"Total cost of design A per 100,000 units \",round(TotalCostA*100000.0/1000,3);\n",
"\n",
"# Design B\n",
"HoursOfLathe=7.0;#in hours/1000Unit\n",
"HoursOfGrinder=12.0;#in hours/1000Unit\n",
"TotalCostB=LatheCost*HoursOfLathe+grinderCost*HoursOfGrinder;#in Rs/1000unit\n",
"\n",
"#result\n",
"print \"Total cost of design A per 100,000 units\",round(TotalCostB*100000.0/1000,3);\n",
"print \"Economic advantage of design B over design A per 100,000 units in Rs \",round(TotalCostA-TotalCostB,3)*100;"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Total cost of design A per 100,000 units 387500.0\n",
"Total cost of design A per 100,000 units 320000.0\n",
"Economic advantage of design B over design A per 100,000 units in Rs 67500.0\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.4,Page 20"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"from math import pi\n",
"Tanks=4.0;#units\n",
"TankDia=5.2;#in meter\n",
"\n",
"#calcualtion\n",
"TankRad=TankDia/2;#in meters\n",
"TankHeight=7;#in meters\n",
"HeightDiaRatio=TankHeight/TankDia;#unitless\n",
"VolPerTank=(22/7)*TankRad**2*TankHeight;#in m^3\n",
"h=VolPerTank/(pi)*64;#in meters\n",
"r=h/8;#in meters\n",
"d=2*r;#in meters\n",
"CostNewDesign=900000*(100.0/111);#in Rs\n",
"\n",
"#result\n",
"print \"Expected savings by redesign in Rs \",round(900000-CostNewDesign,3);"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Expected savings by redesign in Rs 89189.189\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.5,Page 21"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"#steel frame\n",
"distance=2500.0;#in Km\n",
"TransCost=1.0;#in Rs/Kg/100Km\n",
"SteelFramePrice=1000.0;#in Rs/Unit\n",
"SteelFrameWeight=75.0;#in Kg/Unit\n",
"\n",
"#calculation\n",
"TotalCost1=SteelFramePrice+TransCost*SteelFrameWeight*distance/100;#in Rs\n",
"\n",
"#result\n",
"print \"Total cost of steel window frame per unit in Rs \",round(TotalCost1,3);\n",
"\n",
"# Aluminium window frame\n",
"AlumilniumFramePrice=1500.0;#in Rs/Unit\n",
"AlumilniumFrameWeight=28.0;#in Kg/Unit\n",
"\n",
"#calculation\n",
"TotalCost2=AlumilniumFramePrice+TransCost*AlumilniumFrameWeight*distance/100;#in Rs\n",
"\n",
"#result\n",
"print \"Total cost of Alumilnium window frame per unit in Rs \",round(TotalCost2,3);\n",
"print \"DECISION : The total cost per unit of the aluminium window frame is less than that of steel window frame. Hence, Alumilnium window frame is recommended. The Economic advantage per unit of the Alumilnium window frame over steel window frame in Rs \",round(TotalCost1-TotalCost2,3)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Total cost of steel window frame per unit in Rs 2875.0\n",
"Total cost of Alumilnium window frame per unit in Rs 2200.0\n",
"DECISION : The total cost per unit of the aluminium window frame is less than that of steel window frame. Hence, Alumilnium window frame is recommended. The Economic advantage per unit of the Alumilnium window frame over steel window frame in Rs 675.0\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 2.6,Page 23"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#initialisation of variable\n",
"#Cost of component using process sequence 1\n",
"print\"The process sequence 1 of the component is as follows : Turning - Milling - Shaping - Drilling\" ;\n",
"print \"Calculations are summarized in form of table below : \";\n",
"print \"Operation Operation Time Machine Hour rate Cost\";\n",
"print \" No. Min Hour Rs. Rs.\";\n",
"print \" 1 Turning 5 0.083 200 16.60\";\n",
"print \" 2 Milling 8 0.133 400 53.20\";\n",
"print \" 3 Shapiing 10 0.167 350 58.45\";\n",
"print \" 4 Drilling 3 0.050 300 15.00\";\n",
"print \" Total 143.25\";\n",
"\n",
"#Cost of component using process sequence 2\n",
"print \"The process sequence 2 of the component is as follows : Turning - Milling - Drilling\" ;\n",
"print \"Calculations are summarized in form of table below : \";\n",
"print \"Operation Operation Time Machine Hour rate Cost\";\n",
"print \" No. Min Hour Rs. Rs.\";\n",
"print \" 1 Turning 5 0.083 200 16.60\";\n",
"print \" 2 Milling 14 0.233 400 93.20\";\n",
"print \" 4 Drilling 3 0.050 300 15.00\";\n",
"print \" Total 124.80\";\n",
"\n",
"#Cost of component using process sequence 3\n",
"print \"The process sequence 3 of the component is as follows : Only CNC operations\" ;\n",
"print \"Calculations are summarized in form of table below : \";\n",
"print \"Operation Operation Time Machine Hour rate Cost\";\n",
"print \" No. Min Hour Rs. Rs.\";\n",
"print \" 1 CNC 8 0.133 1000 133\";\n",
"\n",
"print \"The process sequence 2 has the least cost. Therefore, it should be selected for manufacturing the component.\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The process sequence 1 of the component is as follows : Turning - Milling - Shaping - Drilling\n",
"Calculations are summarized in form of table below : \n",
"Operation Operation Time Machine Hour rate Cost\n",
" No. Min Hour Rs. Rs.\n",
" 1 Turning 5 0.083 200 16.60\n",
" 2 Milling 8 0.133 400 53.20\n",
" 3 Shapiing 10 0.167 350 58.45\n",
" 4 Drilling 3 0.050 300 15.00\n",
" Total 143.25\n",
"The process sequence 2 of the component is as follows : Turning - Milling - Drilling\n",
"Calculations are summarized in form of table below : \n",
"Operation Operation Time Machine Hour rate Cost\n",
" No. Min Hour Rs. Rs.\n",
" 1 Turning 5 0.083 200 16.60\n",
" 2 Milling 14 0.233 400 93.20\n",
" 4 Drilling 3 0.050 300 15.00\n",
" Total 124.80\n",
"The process sequence 3 of the component is as follows : Only CNC operations\n",
"Calculations are summarized in form of table below : \n",
"Operation Operation Time Machine Hour rate Cost\n",
" No. Min Hour Rs. Rs.\n",
" 1 CNC 8 0.133 1000 133\n",
"The process sequence 2 has the least cost. Therefore, it should be selected for manufacturing the component.\n"
]
}
],
"prompt_number": 13
}
],
"metadata": {}
}
]
}
|
