Facility Layout and Location Department of Systems Engineering
Page 1 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
Term Project, Term 201 ISE 422: Facility Layout and Location
Department of Systems Engineering
King Fahd University of Petroleum and Minerals (KFUPM)
The absolute shortage of hospital beds in all across the nation, gives the Ministry of
Health the green light to build another new republic general hospital in one of the
crowded regions. Constructing the new multi floors hospital is to address the lack of
facilities for patients, most especially those who are suffering dengue. In this regard,
the Ministry has recently signed a project contract with “Horizons” company which
specializes in building healthcare constructions.
Horizons are fully aware of the role of industrial engineers in its projects, and
therefore it is as passionate to hire the best and brightest IE graduates to fulfill its
increasing projects demand. People from different disciplines and backgrounds are
participating in this project, and you as ISE team has been chosen by the company to
take the lead in this innovation.
The company is seeking your team help to achieve the following major tasks:
1. Suggesting possible locations of the new republic general hospital in the
region, and then providing Horizons company the optimal location.
2. Providing the optimal assignment of the hospital departments into its
floors
3. Designing the block layout of each hospital floor.
4. Designing the detailed layouts for parking and warehouse.
5. Locating ambulance stations across the region to serve patients who have
emergency cases.
Relevant data and details are provided in the following pages of the document. Since
the company is unaware of the methodologies that you will be using to design the
facilities, you are allowed to make reasonable assumptions for the missing data. You
are expected to use the standards wherever applicable. Your goal is to provide the
company with the best layout and the locations of the facilities.
Page 2 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
I. General Hospital Location Plan:
Of all the pieces of the planning project, the hospital location is the most strategic and
critical. Once the company build a new hospital, it has made a substantial investment
of time, resources, and capital that can not be changed for a long time. Selecting the
wrong location can be disastrous. The objective here to locate an additional hospital in
the region which consists of several districts. In this location problem, your team
wants to locate this hospital for the best way to serve a set of communities whose
location and demands are known.
Your team knows that the optimal location of the hospital should interact with the
residents where distance travel is involved. As a consequence, typical criteria for such
decision include minimizing some function of the distance between facilities and/ or
residents (i.e., average travel time, average response time, cost function of travel or
response time, maximum travel time or cost, etc.). However, the new location should
account for the undesirable facilities in which the distance from the hospital is
maximized. Examples of undesirable facilities include nuclear and military
installations, equipment emitting particular smell or noise, warehouses containing
flammable materials, districts containing refuse or waste materials, garbage dumps,
sewage plants, correctional centers, etc.
The information of the location of existing facilities /housing zones and the fixed
positive distances is given in the excel worksheet titled Coordinates in Data-xx. xlsx
workbook. Note that the coordinates are labels by their types such as, schools,
airport, industrial complex, housing area, malls, disposal center, governmental
facility, university, medical center, park, post office, hyper supermarket, …etc.
The company assigned to your team the following tasks:
1. Propose three possible locations for the general hospital. The three locations
are obtained using different approaches, models, or criteria. Your team needs
to provide a full justification for the proposed locations. These locations
should be depicted on the map.
2. Select the best location out of the proposed ones. Your team also needs to
provide the reasoning for this selection.
Page 3 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
II. Description of The Needed General Hospital
The designated general hospital in this project may serve as an academic health
facility or community-based entities. It is general in the sense that they admit all types
of medical and surgical cases, and it concentrates on patients with acute illnesses
needing relatively short-term care. As it is a community general hospital too, it varies
in its bed numbers.
Like other general hospitals, it has an organized medical staff, a professional staff of
other health providers (such as nurses, technicians, dietitians, and physiotherapists),
and basic diagnostic equipment. In addition to the essential services relating to patient
care, and depending on size and location, the hospital has 34 main departments need
to be assigned into four floors. The process details inside most of the departments are
ignored at this level. The list of the departments and its areas are provided in the table
below:
Dep# Name Area in ???? Dep# Name Area in ????
1 Accident and emergency
(A&E) 3620 18 Health & Safety 970
2 Admissions 1250 19 Intensive Care Unit
(ICU) 5730
3 Security 2075 20 Human Resources 630
4 Breast Screening 845 21 Infection Control 1086
5 Burn Center 1500 22 Information
Management 313
6 Cardiology 3290 23 Medical Records 793
7 Hospital Warehouse * 24 Cafeteria (2) 490
8 Coronary Care Unit (CCU) 3410 25 Pediatrics 6970
9 Critical Care 5878 26 Radiotherapy 2790
10 Diagnostic Imaging 1320 27 Oncology 2031
11 Elderly services 4796 28 Pharmacy 890
12 Finance Department 4932 29 LAB Work (1) 3200
13 Cafeteria (1) 514 30 LAB Work (2) 3400
14 General Services 3865 31 Management
Department 1080
15 General Surgery 5720 32 Purchasing & Supplies 550
16 Blood Bank and Transfusion
Medicine 5750 33 Nursing 4500
17 Dental Clinic 2160 34 Parking *
Table 1: The breakdown of the hospital departments areas
Page 4 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
As it can be observed from table 1, areas of the warehouse and parking need to be
estimated by your team. Moreover, the hospital consists of 4 floors including the
basement (i.e., ?? = 0, 1, 2, 3). The Ministry of Health made some recommendations
regarding to allocation of some departments into the floors. These restrictions are
provided as follows:
The basement should be specified only for the hospital warehouse.
The departments of Accident and Emergency (A&E), Admissions, Security,
and Elderly services must be on the first floor.
The Labs works can not be on the same floor. Likewise, the cafeterias can not
be on the same floor.
If Management department is assigned to a floor, then departments of Human
Resources and Finance should be assigned on the same floor.
The focus of this section is to develop the block and detailed layout of the multi-floor
hospital. Data regarding the major departments that are essential for the proper
functioning of the hospital are described in this section. Following subsections
highlight the necessary information. Assume any further relevant information and
design the block and detailed layouts.
A. Hospital Warehouse:
As it is recommended, the hospital basement should be dedicated for the warehouse
and its supplementary services. It is intended to be aligned to assist todays healthcare
professionals with the challenges of delivering the highest quality of care in the most
safety and cost efficient manner. The objective here is allow healthcare staff and
professionals to gain quick access to the materials. In order to provide comprehensive
treatment for patients, there is a standard set of equipment that all hospitals should
have ready. This list of medical equipment can often be refurbished as well as new,
allowing hospitals to afford to carry reserves for these key pieces. This includes
hospital stretchers, defibrillators, surgical lights, electrosurgical units, surgical tables,
patient monitors, surgical instruments, sinks and hand washing points, medication
lock boxes, medical carts, warming blankets, pillow, and so on.
The warehouse consists of two areas: Reserve and Forward areas. The medical
suppliers commitment to ship the hospital materials on time. Thus, at the beginning of
Page 5 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
every month hospital materials are received at the reserve areas docking station.
Your team should take the receiving entry/area into consideration while designing the
layout of the hospital building. The reserve area has one receiving dock only, which is
used for unloading the incoming shipments. In the past projects, Horizons adopted the
standard boxes in which incoming shipment contains products consolidated placed
over a pallet (B1210A standard size UK, with height of 2 ??). The total incoming
pallets per month is forecasted as ??(1500,1000) SKUs. Note: ??(??, ??2) represents a
normal distribution with mean ?? and variance ??2. However, due to COVID-19 the
forecasted number of pallets may increase or decrease dramatically. Thus, your team
may accommodate for this uncertainty and provide a better estimation. The incoming
boxes are stored in the reserve area, where the storage policy is randomized storage.
At the beginning of every week, items from the reserve area are brought into the
forward area based on the weekly demand. The stored items in the warehouse are
classified into 14 classes where a class based storage policy is used in the forward
area, and it can have up to three delivery stations. The throughput and space
requirements for these items are given in the excel worksheet titled DEMAND in
Data-xx. xlsx workbook.
B. Parking:
The Ministry of Health expects that the daily visits to the new general hospital follows
a normal distribution with ??(5300,200). Also, the expected number of employees is
2000 ± 150. It is estimated that 25% of the employees will be using bus
transportation system provided by the hospital, and may not be needing the parking.
The company would like to have two types of parking styles (figure 1): Parking area-1
will be a 45?? inclined parking, which will be used by the management and medical
professionals level. Parking area-2 will be perpendicular parking, which will be used
by the other visitors.
The range of activities and services carried out in hospitals on single sites has been
reviewed over the past few years. Radical approaches to the use of assets and capital
will engender different solutions to hospital planning. Some hospitals may cease to be
managed as large single entities. For example, a number of independently managed
specialist functions on or off the existing single site might lead to a requirement for a
range of entry and reception arrangements. Thus, your team should make multiple
Page 6 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
gates where the visors can access to the hospital. These gates can serve for arrival and
departure, dropping off and collection, meeting, security, information, waiting, and so
on.
Figure 1: The difference between Inclined (left) and Perpendicular (right) parking.
III. The Block Layout Problem
Your team is provided with following information regarding to the land where the
new hospital will be built on:
The total area of the land is 32,000 ??2.
The land length is 8,000 ??2, and its width is 4,000 ??2
At maximum, the hospital facility should be built on 70% of the land total
area.
The management would like your team to consider the accessibility to the
roads with the building from the four directions (i.e., north, south, east, and
west).
You are allowed to consider an additional floor if only there is a need to do so.
You are allowed to make reasonable assumptions for the missing data.
The flow between the departments are given in the excel worksheet titled FLOW in
Data-xx. xlsx workbook. Your team is assigned to implement the following tasks:
1. Providing the optimal assignment of the hospital departments into its floors
2. Designing the block layout of each hospital floor.
3. Designing the detailed layouts for parking and warehouse.
Page 7 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
IV. Ambulance Stations
Apart of the project contract, Horizons should locate and build several ambulance
stations across the region. In the behalf of the company, Your team contacted the
Ministry of Health looking for some important inputs including region zones, the
expected number of cases to be served at each zone, the distance between each pair of
zones, travel cost per case per unit distance, the cost of constructing an ambulance
station at a zone, and the capacity of the ambulance station (number of ambulance
trucks). The information is given in the excel worksheet titled Ambulance Stations
in Data-xx. xlsx workbook. Your team mission is to build the optimal number of
ambulance stations serving maximum number of region zones.
V. DELIVERABLES:
1) Identify the location of the new hospital a) Clearly mention your assumptions. b) Propose three possible locations for the general hospital. The three locations
are obtained using different approaches, models, or criteria. Your team needs
to provide a full justification for the proposed locations. These locations
should be depicted on the map.
c) Select the best location out of the proposed ones. Your team also need to provide the reasoning for this selection.
d) Depict the best location on the network 2) Design the block layout of the new hospital:
a) Clearly mention your assumptions b) Build the mathematical model c) Depict the layout on the available area d) Depict the aisles and paths
3) Design the layout of the hospital warehouse: a) Clearly mention your assumptions b) Build the reserve layout c) Build the forward layout d) Draw/depict the top view of the warehouses layout
4) Identify the number and locations of the ambulance stations: a) Clearly mention your assumptions. b) Build the mathematical model c) Depict your solutions on the map network.
You are free to make assumptions. However, the assumptions should be reasonable.
You should provide reasoning/arguments to support your assumptions. You are free to
use any internationally recognized software/solver in order to obtain the solution of
any mathematical model. For example, you can use modeling software like AMPL,
GAMS, LINGO, Python etc. Also, you can use solvers like Cplex, Gurobi or Lingo.
Page 8 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
You need to clearly mention the quality of the solution (optimal solution, or how
close to optimal using relative percentage). You should submit the code of your
mathematical models ( .lg4 file for LINGO users, .gms file for GAMS users, .mod
& .dat files for AMPL), and the result files from the software (users, .lgr for
LINGO users, .lst file for GAMS, and .txt for AMPL users).
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Geology
Education
Engineering
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Environmental science
Spanish
Government
History
Human Resource Management
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Literature
Mathematics
Nursing
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Facility Layout and Location Department of Systems Engineering
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Home>Engineering homework help> Facility Layout and Location Department of Systems Engineering
Page 1 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
Term Project, Term 201 ISE 422: Facility Layout and Location
Department of Systems Engineering
King Fahd University of Petroleum and Minerals (KFUPM)
The absolute shortage of hospital beds in all across the nation, gives the Ministry of
Health the green light to build another new republic general hospital in one of the
crowded regions. Constructing the new multi floors hospital is to address the lack of
facilities for patients, most especially those who are suffering dengue. In this regard,
the Ministry has recently signed a project contract with “Horizons” company which
specializes in building healthcare constructions.
Horizons are fully aware of the role of industrial engineers in its projects, and
therefore it is as passionate to hire the best and brightest IE graduates to fulfill its
increasing projects demand. People from different disciplines and backgrounds are
participating in this project, and you as ISE team has been chosen by the company to
take the lead in this innovation.
The company is seeking your team help to achieve the following major tasks:
1. Suggesting possible locations of the new republic general hospital in the
region, and then providing Horizons company the optimal location.
2. Providing the optimal assignment of the hospital departments into its
floors
3. Designing the block layout of each hospital floor.
4. Designing the detailed layouts for parking and warehouse.
5. Locating ambulance stations across the region to serve patients who have
emergency cases.
Relevant data and details are provided in the following pages of the document. Since
the company is unaware of the methodologies that you will be using to design the
facilities, you are allowed to make reasonable assumptions for the missing data. You
are expected to use the standards wherever applicable. Your goal is to provide the
company with the best layout and the locations of the facilities.
Page 2 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
I. General Hospital Location Plan:
Of all the pieces of the planning project, the hospital location is the most strategic and
critical. Once the company build a new hospital, it has made a substantial investment
of time, resources, and capital that can not be changed for a long time. Selecting the
wrong location can be disastrous. The objective here to locate an additional hospital in
the region which consists of several districts. In this location problem, your team
wants to locate this hospital for the best way to serve a set of communities whose
location and demands are known.
Your team knows that the optimal location of the hospital should interact with the
residents where distance travel is involved. As a consequence, typical criteria for such
decision include minimizing some function of the distance between facilities and/ or
residents (i.e., average travel time, average response time, cost function of travel or
response time, maximum travel time or cost, etc.). However, the new location should
account for the undesirable facilities in which the distance from the hospital is
maximized. Examples of undesirable facilities include nuclear and military
installations, equipment emitting particular smell or noise, warehouses containing
flammable materials, districts containing refuse or waste materials, garbage dumps,
sewage plants, correctional centers, etc.
The information of the location of existing facilities /housing zones and the fixed
positive distances is given in the excel worksheet titled Coordinates in Data-xx. xlsx
workbook. Note that the coordinates are labels by their types such as, schools,
airport, industrial complex, housing area, malls, disposal center, governmental
facility, university, medical center, park, post office, hyper supermarket, …etc.
The company assigned to your team the following tasks:
1. Propose three possible locations for the general hospital. The three locations
are obtained using different approaches, models, or criteria. Your team needs
to provide a full justification for the proposed locations. These locations
should be depicted on the map.
2. Select the best location out of the proposed ones. Your team also needs to
provide the reasoning for this selection.
Page 3 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
II. Description of The Needed General Hospital
The designated general hospital in this project may serve as an academic health
facility or community-based entities. It is general in the sense that they admit all types
of medical and surgical cases, and it concentrates on patients with acute illnesses
needing relatively short-term care. As it is a community general hospital too, it varies
in its bed numbers.
Like other general hospitals, it has an organized medical staff, a professional staff of
other health providers (such as nurses, technicians, dietitians, and physiotherapists),
and basic diagnostic equipment. In addition to the essential services relating to patient
care, and depending on size and location, the hospital has 34 main departments need
to be assigned into four floors. The process details inside most of the departments are
ignored at this level. The list of the departments and its areas are provided in the table
below:
Dep# Name Area in ???? Dep# Name Area in ????
1 Accident and emergency
(A&E) 3620 18 Health & Safety 970
2 Admissions 1250 19 Intensive Care Unit
(ICU) 5730
3 Security 2075 20 Human Resources 630
4 Breast Screening 845 21 Infection Control 1086
5 Burn Center 1500 22 Information
Management 313
6 Cardiology 3290 23 Medical Records 793
7 Hospital Warehouse * 24 Cafeteria (2) 490
8 Coronary Care Unit (CCU) 3410 25 Pediatrics 6970
9 Critical Care 5878 26 Radiotherapy 2790
10 Diagnostic Imaging 1320 27 Oncology 2031
11 Elderly services 4796 28 Pharmacy 890
12 Finance Department 4932 29 LAB Work (1) 3200
13 Cafeteria (1) 514 30 LAB Work (2) 3400
14 General Services 3865 31 Management
Department 1080
15 General Surgery 5720 32 Purchasing & Supplies 550
16 Blood Bank and Transfusion
Medicine 5750 33 Nursing 4500
17 Dental Clinic 2160 34 Parking *
Table 1: The breakdown of the hospital departments areas
Page 4 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
As it can be observed from table 1, areas of the warehouse and parking need to be
estimated by your team. Moreover, the hospital consists of 4 floors including the
basement (i.e., ?? = 0, 1, 2, 3). The Ministry of Health made some recommendations
regarding to allocation of some departments into the floors. These restrictions are
provided as follows:
The basement should be specified only for the hospital warehouse.
The departments of Accident and Emergency (A&E), Admissions, Security,
and Elderly services must be on the first floor.
The Labs works can not be on the same floor. Likewise, the cafeterias can not
be on the same floor.
If Management department is assigned to a floor, then departments of Human
Resources and Finance should be assigned on the same floor.
The focus of this section is to develop the block and detailed layout of the multi-floor
hospital. Data regarding the major departments that are essential for the proper
functioning of the hospital are described in this section. Following subsections
highlight the necessary information. Assume any further relevant information and
design the block and detailed layouts.
A. Hospital Warehouse:
As it is recommended, the hospital basement should be dedicated for the warehouse
and its supplementary services. It is intended to be aligned to assist todays healthcare
professionals with the challenges of delivering the highest quality of care in the most
safety and cost efficient manner. The objective here is allow healthcare staff and
professionals to gain quick access to the materials. In order to provide comprehensive
treatment for patients, there is a standard set of equipment that all hospitals should
have ready. This list of medical equipment can often be refurbished as well as new,
allowing hospitals to afford to carry reserves for these key pieces. This includes
hospital stretchers, defibrillators, surgical lights, electrosurgical units, surgical tables,
patient monitors, surgical instruments, sinks and hand washing points, medication
lock boxes, medical carts, warming blankets, pillow, and so on.
The warehouse consists of two areas: Reserve and Forward areas. The medical
suppliers commitment to ship the hospital materials on time. Thus, at the beginning of
Page 5 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
every month hospital materials are received at the reserve areas docking station.
Your team should take the receiving entry/area into consideration while designing the
layout of the hospital building. The reserve area has one receiving dock only, which is
used for unloading the incoming shipments. In the past projects, Horizons adopted the
standard boxes in which incoming shipment contains products consolidated placed
over a pallet (B1210A standard size UK, with height of 2 ??). The total incoming
pallets per month is forecasted as ??(1500,1000) SKUs. Note: ??(??, ??2) represents a
normal distribution with mean ?? and variance ??2. However, due to COVID-19 the
forecasted number of pallets may increase or decrease dramatically. Thus, your team
may accommodate for this uncertainty and provide a better estimation. The incoming
boxes are stored in the reserve area, where the storage policy is randomized storage.
At the beginning of every week, items from the reserve area are brought into the
forward area based on the weekly demand. The stored items in the warehouse are
classified into 14 classes where a class based storage policy is used in the forward
area, and it can have up to three delivery stations. The throughput and space
requirements for these items are given in the excel worksheet titled DEMAND in
Data-xx. xlsx workbook.
B. Parking:
The Ministry of Health expects that the daily visits to the new general hospital follows
a normal distribution with ??(5300,200). Also, the expected number of employees is
2000 ± 150. It is estimated that 25% of the employees will be using bus
transportation system provided by the hospital, and may not be needing the parking.
The company would like to have two types of parking styles (figure 1): Parking area-1
will be a 45?? inclined parking, which will be used by the management and medical
professionals level. Parking area-2 will be perpendicular parking, which will be used
by the other visitors.
The range of activities and services carried out in hospitals on single sites has been
reviewed over the past few years. Radical approaches to the use of assets and capital
will engender different solutions to hospital planning. Some hospitals may cease to be
managed as large single entities. For example, a number of independently managed
specialist functions on or off the existing single site might lead to a requirement for a
range of entry and reception arrangements. Thus, your team should make multiple
Page 6 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
gates where the visors can access to the hospital. These gates can serve for arrival and
departure, dropping off and collection, meeting, security, information, waiting, and so
on.
Figure 1: The difference between Inclined (left) and Perpendicular (right) parking.
III. The Block Layout Problem
Your team is provided with following information regarding to the land where the
new hospital will be built on:
The total area of the land is 32,000 ??2.
The land length is 8,000 ??2, and its width is 4,000 ??2
At maximum, the hospital facility should be built on 70% of the land total
area.
The management would like your team to consider the accessibility to the
roads with the building from the four directions (i.e., north, south, east, and
west).
You are allowed to consider an additional floor if only there is a need to do so.
You are allowed to make reasonable assumptions for the missing data.
The flow between the departments are given in the excel worksheet titled FLOW in
Data-xx. xlsx workbook. Your team is assigned to implement the following tasks:
1. Providing the optimal assignment of the hospital departments into its floors
2. Designing the block layout of each hospital floor.
3. Designing the detailed layouts for parking and warehouse.
Page 7 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
IV. Ambulance Stations
Apart of the project contract, Horizons should locate and build several ambulance
stations across the region. In the behalf of the company, Your team contacted the
Ministry of Health looking for some important inputs including region zones, the
expected number of cases to be served at each zone, the distance between each pair of
zones, travel cost per case per unit distance, the cost of constructing an ambulance
station at a zone, and the capacity of the ambulance station (number of ambulance
trucks). The information is given in the excel worksheet titled Ambulance Stations
in Data-xx. xlsx workbook. Your team mission is to build the optimal number of
ambulance stations serving maximum number of region zones.
V. DELIVERABLES:
1) Identify the location of the new hospital a) Clearly mention your assumptions. b) Propose three possible locations for the general hospital. The three locations
are obtained using different approaches, models, or criteria. Your team needs
to provide a full justification for the proposed locations. These locations
should be depicted on the map.
c) Select the best location out of the proposed ones. Your team also need to provide the reasoning for this selection.
d) Depict the best location on the network 2) Design the block layout of the new hospital:
a) Clearly mention your assumptions b) Build the mathematical model c) Depict the layout on the available area d) Depict the aisles and paths
3) Design the layout of the hospital warehouse: a) Clearly mention your assumptions b) Build the reserve layout c) Build the forward layout d) Draw/depict the top view of the warehouses layout
4) Identify the number and locations of the ambulance stations: a) Clearly mention your assumptions. b) Build the mathematical model c) Depict your solutions on the map network.
You are free to make assumptions. However, the assumptions should be reasonable.
You should provide reasoning/arguments to support your assumptions. You are free to
use any internationally recognized software/solver in order to obtain the solution of
any mathematical model. For example, you can use modeling software like AMPL,
GAMS, LINGO, Python etc. Also, you can use solvers like Cplex, Gurobi or Lingo.
Page 8 of 8
ISE 422 Term Project-201 Almaraj & Alghazi
You need to clearly mention the quality of the solution (optimal solution, or how
close to optimal using relative percentage). You should submit the code of your
mathematical models ( .lg4 file for LINGO users, .gms file for GAMS users, .mod
& .dat files for AMPL), and the result files from the software (users, .lgr for
LINGO users, .lst file for GAMS, and .txt for AMPL users).
Applied Sciences
Architecture and Design
Biology
Business & Finance
Chemistry
Computer Science
Geography
Geology
Education
Engineering
English
Environmental science
Spanish
Government
History
Human Resource Management
Information Systems
Law
Literature
Mathematics
Nursing
Physics
Political Science
Psychology
Reading
Science
Social Science
Home
Homework Answers
Blog
Archive
Tags
Reviews
Contact
twitterfacebook
Copyright © 2021 SweetStudy.com
