SCHEDULING AND IMPLEMENTATION OF
SCHEDULING IN B.E.S.T.
Group Members :
Sampada Mhaskar : 93Bhagyashri Khale : 68
Shailey Khare : 72Anish Nimbalkar : 102
Sarvesh Matwankar : 89Bhavin Mehta : 90
SCHEDULING
WHAT ?
It is an Important tool for ? Scheduling
It is done for material, part, machines etc.
It is second step to production Planning and control
It comes after routing
It is a time table of
production
It gives lot of importance to the time element in the production process
It gives the starting and completing date
and time for each(job)
OVERVIEW It covers following areas in particular:
- Assign job to particular work center/machine- Time of assignment of Job and completion- Allocation of resources like manpower and materials- Time sequencing of Operations- Feedback and Control functions to take care of Deviations
Techniques of Scheduling varies with the type of layout and type of job like job-shop or batch production and mass production
TYPES OF SCHEDULING Long Term Scheduling Medium Term Scheduling Short Term Scheduling
OBJECTIVES OF SCHEDULING
Making efficient use of the labor
Making best possible use of the equipment that are available for use
Increasing the output
Improving the service level
Increasing the profit
OBJECTIVES OF SCHEDULING (CONTD.)
Maximizing the delivery performance i.e. meeting the delivery dates
Minimizing the inventory
Reducing the manufacturing time
Minimizing the production costs
Minimizing the worker costs
FUNCTIONS OF SCHEDULING Allocation of the resources
Shop floor control
Making maximum use of the plant at minimum possible cost
Ensure that the needs of the manpower are optimum
Determination of the sequence of the jobs
FUNCTIONS OF SCHEDULING(CONTD.)
Specifying the start and the end time for each job (actively scheduled)
Getting quick feedback from the shops regarding the delays and the various interruptions
Possess up – to – date information for the availability of the materials, expected delivery dates etc.
Possess up – to – date data on the machine regarding its breakdown, servicing etc.
MANUFACTURING PROCESS
METHODS OF SCHEDULING1. Forward operations scheduling
Classified on the basis of the time All the activities are scheduled from the date of the planned
order release First task of the job is scheduled Its subsequent task is scheduled on the scheduled completion of
the first task Like this, accordingly all the tasks of the job are scheduled Ex. Hospital, Clinics, Fine Dining restaurants, M/C tool
manufacturer
METHODS OF SCHEDULING (CONTD.)
2. Backward operations scheduling
Also classified on the basis of the time Activities are scheduled from the date or the planned receipt
date The last activity is scheduled first Time of the start of the last task is considered as the time for
the start of the previous activity Ex. Arrangement for special event like marriages, exam studies
etc
Routing
Loading
Dispatching
ACTIVITIES INVOLVED
SCHEDULING CRITERIAS
Minimum completion time
Maximum utilization
Minimum work in progress inventory
Minimize customer waiting time
PRIORITY RULES First come first serve (FCFS)
Shortest processing time (STP)
Earliest due date
Longest Processing Time (LPT)
Slack time remaining (STR)
ADVANTAGES OF SCHEDULING PREDICT-ABILITY :- A scheduling system makes everyone’s
job easier by adding predictability to the AIS environment To superiors:- it provides a means of holding down costs
through better use of personnel and equipment. Effective use of all AIS resources Increased throughput Decreased turnaround time User deadlines met Improved communications with users Avoidance of overloading and underuse of resources Job delays more readily apparent
Scheduling in B.E.S.T.
B.E.S.T. (BRIHANMUMBAI ELECTRIC
SUPPLY AND TRANSPORT) Started in year 1907 Total 4680 bus 365 routes 25 depots 22000 bus drivers and conductors 4.8 million passengers It is considered a second heart of the city
B.E.S.T. SCHEDULING
A. Placement of the Bus Route in new area:
1. Proper route placement The route creation process
2. Identify an area that needs new transit service Determine the terminus locations
3. Other factors Designing the route include the presence of other routes nearby and the type of street the bus will travel upon
Speed bumps, speed humps, or traffic circles should also be avoided
B. Route In Existing Area :
Plan new bus routes operating in areas with existing coverage
These new routes are often have limited stop or express versions of existing local routes
Provide direct service between two trip generator
Service levels increase
B.E.S.T. SCHEDULING(CONTD.)
C. Placement of Bus Stops
Appropriate distance between each bus stop
Placement of bus stops - Pedestrian access
Adopting guidelines which allow for wider stop spacing offers several advantages to the transit system
Site visit to determine the actual placement at the intersection. Bus stops should be located near traffic signals, or at least marked crosswalks
B.E.S.T. SCHEDULING(CONTD.)
D. Determination of time for the Bus
Each route will at the very least have two timing points: the start and end of the route
Optimum number of time points be selected for the route
B.E.S.T. SCHEDULING(CONTD.)
E. Writing the Bus Schedule
What our stops are ? How long it will take to travel between our stops ?
1. Using computer scheduling software The most important benefit of scheduling software lies in its
run cutting function
B.E.S.T. SCHEDULING(CONTD.)
2. For scheduling a particular route two things are important
The service span of the route For existing route – we would consider a demand basedservice span based on the first and last trip.
If no body was riding - reduce the service span.
If a significant no. of people were riding - 50 % or moreconsider the service span.
B.E.S.T. SCHEDULING(CONTD.)
3. Policy based service span and the run cutting process
Policy based service span- specific time periods
The run cutting process- make it easier and more cost effective to schedule the drivers
B.E.S.T. SCHEDULING(CONTD.)
The frequency/headway of the route
1. Demand based headwayHow often buses will pass by a particular point along the route
Minimum number of buses required per hour
Load factor- maximum number of passengers per bus, every seat is full no body is standing-i.e. in the ratio of 1.0
B.E.S.T. SCHEDULING(CONTD.)
2. Policy based headway
Operate a minimal level of service.
All of their routes operate at least every thirty minutes whenever the subway is in operation.
From 4.30 AM to 2 AM Monday to Saturday
From 6 AM to 2 AM on Sunday
B.E.S.T. SCHEDULING(CONTD.)
Once the determination of service span and the headway the actual creation of the schedule is quite straightforward.
By using scheduling software :1. ESRI2. Hastus
B.E.S.T. SCHEDULING(CONTD.)
Thank You !!!