Production Planning & Cost interview questions

1. A.conversion is the fraction of reactant consumed; yield is desired product formed per unit of reactant fed
2. B.finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
3. C.sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
4. D.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down

Answer + AI explanation with Pro

1. A.Conversion vs yield
2. B.Variable vs fixed cost
3. C.Specific consumption
4. D.Contribution margin

Answer + AI explanation with Pro

1. A.Conversion vs yield — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
2. B.Conversion vs yield — raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
3. C.Conversion vs yield — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
4. D.Conversion vs yield — conversion is the fraction of reactant consumed; yield is desired product formed per unit of reactant fed

Answer + AI explanation with Pro

1. A.comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss
2. B.overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
3. C.sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
4. D.finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%

Answer + AI explanation with Pro

1. A.Production scheduling
2. B.Solomon energy intensity index
3. C.Conversion vs yield
4. D.OEE

Answer + AI explanation with Pro

1. A.OEE — finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
2. B.OEE — conversion is the fraction of reactant consumed; yield is desired product formed per unit of reactant fed
3. C.OEE — comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss
4. D.OEE — overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class

Answer + AI explanation with Pro

1. A.raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
2. B.finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
3. C.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
4. D.comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss

Answer + AI explanation with Pro

1. A.Debottlenecking
2. B.Specific consumption
3. C.Contribution margin
4. D.Conversion vs yield

Answer + AI explanation with Pro

1. A.Specific consumption — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
2. B.Specific consumption — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
3. C.Specific consumption — finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
4. D.Specific consumption — sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools

Answer + AI explanation with Pro

1. A.comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss
2. B.raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
3. C.sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
4. D.conversion is the fraction of reactant consumed; yield is desired product formed per unit of reactant fed

Answer + AI explanation with Pro

1. A.Debottlenecking
2. B.Variable vs fixed cost
3. C.Contribution margin
4. D.Mass balance closure

Answer + AI explanation with Pro

1. A.Mass balance closure — raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
2. B.Mass balance closure — comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss
3. C.Mass balance closure — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
4. D.Mass balance closure — overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class

Answer + AI explanation with Pro

1. A.overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
2. B.comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss
3. C.finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
4. D.benchmark comparing a refinery's actual energy use with a standard for its configuration, where lower is better and 100 is the reference

Answer + AI explanation with Pro

1. A.Debottlenecking
2. B.Specific consumption
3. C.Mass balance closure
4. D.Variable vs fixed cost

Answer + AI explanation with Pro

1. A.Debottlenecking — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
2. B.Debottlenecking — overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
3. C.Debottlenecking — finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
4. D.Debottlenecking — benchmark comparing a refinery's actual energy use with a standard for its configuration, where lower is better and 100 is the reference

Answer + AI explanation with Pro

1. A.sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
2. B.raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
3. C.raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
4. D.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down

Answer + AI explanation with Pro

1. A.OEE
2. B.Variable vs fixed cost
3. C.Conversion vs yield
4. D.Contribution margin

Answer + AI explanation with Pro

1. A.Variable vs fixed cost — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
2. B.Variable vs fixed cost — raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
3. C.Variable vs fixed cost — finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
4. D.Variable vs fixed cost — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI

Answer + AI explanation with Pro

1. A.sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
2. B.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
3. C.conversion is the fraction of reactant consumed; yield is desired product formed per unit of reactant fed
4. D.raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate

Answer + AI explanation with Pro

1. A.Contribution margin
2. B.Mass balance closure
3. C.Production scheduling
4. D.OEE

Answer + AI explanation with Pro

1. A.Production scheduling — overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
2. B.Production scheduling — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
3. C.Production scheduling — sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
4. D.Production scheduling — comparison of measured inputs against outputs and inventory change; a gap beyond 1–2% points to meter error or unaccounted loss

Answer + AI explanation with Pro

1. A.overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
2. B.raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
3. C.finding the unit that limits throughput, such as a compressor or a flooding column, and relieving it with minimal capex to raise capacity 10–20%
4. D.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down

Answer + AI explanation with Pro

1. A.Specific consumption
2. B.Conversion vs yield
3. C.Contribution margin
4. D.OEE

Answer + AI explanation with Pro

1. A.Contribution margin — sequencing campaigns to minimise changeovers and cleaning while matching inventory and delivery commitments, using MRP or APS tools
2. B.Contribution margin — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
3. C.Contribution margin — benchmark comparing a refinery's actual energy use with a standard for its configuration, where lower is better and 100 is the reference
4. D.Contribution margin — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI

Answer + AI explanation with Pro

1. A.overall equipment effectiveness, the product of availability, performance rate and quality rate, with about 85% regarded as world class
2. B.raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
3. C.benchmark comparing a refinery's actual energy use with a standard for its configuration, where lower is better and 100 is the reference
4. D.selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down

Answer + AI explanation with Pro

1. A.Specific consumption
2. B.Mass balance closure
3. C.Solomon energy intensity index
4. D.Contribution margin

Answer + AI explanation with Pro

1. A.Solomon energy intensity index — raw material or energy used per tonne of product, such as Gcal per tonne urea or kWh per tonne caustic, the primary efficiency KPI
2. B.Solomon energy intensity index — raw materials, utilities and catalyst vary with output; labour, maintenance, depreciation and overheads do not, so unit cost falls at higher rate
3. C.Solomon energy intensity index — selling price minus variable cost per tonne, used to rank products and decide whether to run at reduced rate or shut down
4. D.Solomon energy intensity index — benchmark comparing a refinery's actual energy use with a standard for its configuration, where lower is better and 100 is the reference

Answer + AI explanation with Pro