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A LOAD SCHEDULE FOR THE ASSEMBLY PRODUCTION OF SPECIFIED ORDERS RELATIVE TO A PLANT'S CAPACITY
54
by Miltiadis A. Boboulos
Miltiadis A. Boboulos
A LOAD SCHEDULE FOR THE ASSEMBLY PRODUCTION OF SPECIFIED ORDERS RELATIVE TO A PLANT'S CAPACITY
54
by Miltiadis A. Boboulos
Miltiadis A. Boboulos
eBook
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Overview
In the case study presented in this FREE, ready for download eBook, the implementation of a load production schedule for fed assemblies has been related to available plant capacity in order to be evaluated through analysis and synthesis stages. Initially, preliminary data breakdowns, structural, and quantitative interrelations between the product and its components have been performed. Product visualization by exploded view presentation has been worked out. Sequentially, estimation and analysis of delivery times, manufacturing, and assembly of raw materials, component parts, and products, along with the required quantities have been estimated. Determination of the Critical Path Component through initial imitation synthesis followed with the Critical Path Analysis. A preliminary schedule
INTRODUCTION
Operations and quality management involves the management of resources for
the production of goods and services. This includes such functions as work force
planning, inventory management, logistics management, production planning
and control, resource allocation; and emphasises total quality management
principles. Operations managers deal with people, materials, technology and
deadlines (Halevi, 2001).
Loading indicates the specified time required to produce a single unit of the
specified product in individual manufacturing facilities involved in the
production of the product and further placement of orders to production
departments, such that: an optimum utilisation of available resources is
achieved; facilities overload is avoided; realistic dates of producing ordered
quantities are defined; out-of balance production facilities are highlighted in
order to take any corrective action as necessary to avoid this situation
(Karmarkar, 1993).
Limit loading implies to load the work schedule of a specific production unit
until the time corresponding to the specified capacity of this facility is reached.
This particular method of load definition is used to determine the realistic dates
of delivery of required component parts and products. It is assumed here that a
limit capacity has already been defined for each individual production unit to be
involved (Powell et all., 1995). Additionally, it is also assumed that loading
information for each individual order is already available by the time the order
is placed to the production department, as is the case being discussed here. The
problem to be solved here is how to distribute this load information among
different production units.
The two methods to accomplish this distribution are the Forward and backward
loading. The forward loading begins with the present date and loads jobs
forward in time. The processing time is accumulated against each work centre,
assuming infinite or finite capacity. In this case, due dates may be exceeded if necessary. Since average waiting times are used in queues, the resulting job
completion date is only an approximation of the date which might be calculated
by more precise scheduling. The purpose of forward loading is to determine the
approximate completion date of each job and, in the case of infinite capacity, the
capacity required in each time period (Lyons, 2004). Backward loading begins
with the due date for each job and loads the processing-time requirements
against each work centre by proceeding backward in time. The capacity of work
centres may be exceeded if necessary.
The purpose of backward loading is to calculate the capacity required in each
work centre for each time period. As a result, it may be decided that capacity
should be reallocated between work centres or that more total capacity should be
made available through revised aggregate planning as suggested in Kats (2008).
Due dates of jobs are always given for backward loading.
In current loading case study, a schedule of the production load for the specified
assemblies of components relative to the available production capacity has been
created. Estimations also on the earliest date of delivery ex-manufacturer’s
warehouse for an order placed in the 20th week for 100 assemblies (product
type A) have been processed. Additionally, the starting and final week for each
individual sub-assembly and component and the date of ordering raw materials
have been estimated, using both forward and backward loading.
In present case study, the load scheduling for the production of specified
assemblies relevant to the available capacity had to go through the following
stages: (a) Make an analysis of preliminary data (structural and quantitative
interrelations between product A and its components) and visualisation of the
product by means of presenting it in an exploded view; (b) Estimate and analyse
times of delivery, manufacturing and assembly of raw materials,
INTRODUCTION
Operations and quality management involves the management of resources for
the production of goods and services. This includes such functions as work force
planning, inventory management, logistics management, production planning
and control, resource allocation; and emphasises total quality management
principles. Operations managers deal with people, materials, technology and
deadlines (Halevi, 2001).
Loading indicates the specified time required to produce a single unit of the
specified product in individual manufacturing facilities involved in the
production of the product and further placement of orders to production
departments, such that: an optimum utilisation of available resources is
achieved; facilities overload is avoided; realistic dates of producing ordered
quantities are defined; out-of balance production facilities are highlighted in
order to take any corrective action as necessary to avoid this situation
(Karmarkar, 1993).
Limit loading implies to load the work schedule of a specific production unit
until the time corresponding to the specified capacity of this facility is reached.
This particular method of load definition is used to determine the realistic dates
of delivery of required component parts and products. It is assumed here that a
limit capacity has already been defined for each individual production unit to be
involved (Powell et all., 1995). Additionally, it is also assumed that loading
information for each individual order is already available by the time the order
is placed to the production department, as is the case being discussed here. The
problem to be solved here is how to distribute this load information among
different production units.
The two methods to accomplish this distribution are the Forward and backward
loading. The forward loading begins with the present date and loads jobs
forward in time. The processing time is accumulated against each work centre,
assuming infinite or finite capacity. In this case, due dates may be exceeded if necessary. Since average waiting times are used in queues, the resulting job
completion date is only an approximation of the date which might be calculated
by more precise scheduling. The purpose of forward loading is to determine the
approximate completion date of each job and, in the case of infinite capacity, the
capacity required in each time period (Lyons, 2004). Backward loading begins
with the due date for each job and loads the processing-time requirements
against each work centre by proceeding backward in time. The capacity of work
centres may be exceeded if necessary.
The purpose of backward loading is to calculate the capacity required in each
work centre for each time period. As a result, it may be decided that capacity
should be reallocated between work centres or that more total capacity should be
made available through revised aggregate planning as suggested in Kats (2008).
Due dates of jobs are always given for backward loading.
In current loading case study, a schedule of the production load for the specified
assemblies of components relative to the available production capacity has been
created. Estimations also on the earliest date of delivery ex-manufacturer’s
warehouse for an order placed in the 20th week for 100 assemblies (product
type A) have been processed. Additionally, the starting and final week for each
individual sub-assembly and component and the date of ordering raw materials
have been estimated, using both forward and backward loading.
In present case study, the load scheduling for the production of specified
assemblies relevant to the available capacity had to go through the following
stages: (a) Make an analysis of preliminary data (structural and quantitative
interrelations between product A and its components) and visualisation of the
product by means of presenting it in an exploded view; (b) Estimate and analyse
times of delivery, manufacturing and assembly of raw materials,
Product Details
| BN ID: | 2940013804685 |
|---|---|
| Publisher: | Angela Han |
| Publication date: | 12/25/2011 |
| Sold by: | Barnes & Noble |
| Format: | eBook |
| Pages: | 54 |
| File size: | 2 MB |
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