Asprova Threejjjjjj

8/11/2019 Asprova Threejjjjjj

1/28

AsprovaHigh Speed Scheduling

Melissa Brankamp [email protected]

Erin Johnson [email protected]

Gerald Eheduru [email protected] Cestari [email protected]

Suprena Isaac [email protected]


2/28

Basics from Asprova Corporation

Production scheduling is the central mechanism for controlling production in a factory and making

decisions about what to produce, when to produce it, and what resources to use in its production. It

is also the key to knowing and understanding what is going on in your factory - not just now, buthours, days, and weeks into the future.

Enormous improvements have been made in production scheduling in the past years through the

development of high-speed automated production scheduling software. Most noted among these is

the scheduling system Asprova, which has its roots in the artificial intelligence boom and Japanese

just-in-time manufacturing practices, and which has long been accepted as the de-facto standard forproduction scheduling among Japanese manufacturers.

Asprova is a production scheduling system developed and distributed by Asprova Corporation.


3/28

How Does Asprova Work? It manipulates input and output data by default via the operating system's file system, so

that it is not dependent upon any particular database format. The data is comprised offiles containing Project Settings and Guide Settings, as well as multiple table files. As allthis data is read into memory when the project is loaded, file access during scheduling

is unnecessary, allowing computation to be performed at extremely high speeds. A single schedule along with all related data is called a Project. Asprova is capable of

having multiple projects open at the same time. Each project includes multiple tables(databases) which contain the data upon which the schedule is based.

Asprova's scheduling engine is extremely rich in features. But when viewed from adifferent angle, the activity of the scheduling engine is quite simple.

The fundamental function of Asprova's Guide is to display information from the project'stables visually from every possible angle. An example is changing assigned resourcesand times by dragging a job on the Gantt chart. The core of Asprova's GUI is the Ganttchart and the other graph windows. These windows display the table contents along atime line or display the aggregate results in a histogram.


4/28

Asprova's Main Window(1) Menu Bar

Used in executing various Asprova functions. The menu itemsavailable for execution will vary depending on the type ofwindow in the foreground.

(2)Toolbar

Allows execution of Asprova commands with a single button click.(3)Windows

Multiple windows can be open at the same time, including projectwindows, Gantt charts, evaluation graphs, table views, andcustom HTML views.

(4)Tab

Click on a tab to bring a different window into the foreground.

(5)Output Window

Currently consists of a single message window tab.(6)Output Window Close Button

Click this to close the output window.

(7)Status Bar

Displays short messages describing the object at the currentlocation of the mouse pointer.

(8)Number of Unassigned Jobs

Displays the current number of unassigned jobs. Note that this

number will be zero if job generation has not yet beenperformed, or if all jobs have been successfully assigned.


5/28

Asprova's Project window


6/28

Environment Settings

The data specified in the environment settings

dialog affects the whole of Asprova.

Environment Settings has the followingpages:

General Settings

Display Color

Messages

User Registration

Sound

Log

Toolbars

Commands

Options

Advance Settings


7/28

Project SettingsThe data specified in the project settings dialog

affects the currently active project.

Project name

You can specify here a name for the current

project, which will be displayed in the titlebar of all related windows to distinguish

them from windows of other projects. The

project name does not affect the actual

functionality of Asprova.

Table holding results data

You can specify here whether results data

will be entered and maintained in the results

table or in the job table. This choice shouldgenerally be made before introduction of

Asprova into the factory, as it will affect the

way in which Asprova is integrated with

other data management systems.

Comments

You can enter here comments regarding the

current project. These comments do notaffect the actual functionality of Asprova.


8/28

Scheduling basis time

The scheduling basis time generally refers to the

"present time.

Scheduling period

You can specify here the start and end times of the

scheduling period via the time setting dialog.Scheduling freeze time

Defines the end of the scheduling freeze period. The

meaning of the scheduling freeze period is that

whenever the project is loaded, Asprova will

automatically mark all jobs within the scheduling

freeze period as "frozen", which will prevent the

assignment status of those jobs from being changed

when rescheduling is performed.isplay period start time

You can specify here the start time of Asprova's

display period. The end time of the display period is

always the scheduling end time.

ay demarcation time

The time at which one day is considered to end and

the next to start -- as a time of day between 0:00:00and 23:59:59.

Project Settings (contd.)


9/28

You can choose here the method for

handling inventory data in Asprova.



10/28

Reflect reported quantities onto scheduled quantities

Suppose that a certain job was scheduled to produce 100 of

its output item, but results data was reported saying

that the job was completed after producing only 90

items. If this option is checked, then the fact that thisjob completed only 90 percent of its scheduled output

will be reflected onto the schedule of the entire lot by

decreasing the scheduled production quantity of the

finished item by 10 percent. It this option is not

checked, then the schedule will remain unchanged,

regardless of the possibility of an item shortage in later

jobs.

Automatically delete result records not bound to jobs

You can specify here whether or not to automatically delete

result records which have fallen out of use because of

the deletion of the corresponding job or because of the

existence of a more recent result record for that job.

Don't calculate setup time for results jobs

Skip calculation of setup time for jobs with results.



11/28

Scheduling Parameter SettingsDispatching

A dispatching rule in Asprova is defined by up to 5 different

sort keys, with the first sort key having highest precedence.

You should first specify the number of sort keysyou will

use, and then for each one specify the type of sort key and

whether it will sort the jobs/lots in ascending or descendingorder.

Weights

You can specify here the weights to be applied to the

various criteria for evaluating the tentative assignment of a

task to a candidate resource during scheduling.

Options

You can specify the methods you will be using to

determining the resource to which a task will be assigned.

Target Lots

On this property page you can specify various conditions

for filtering the target lots to be assigned with the current

scheduling parameter.

Target Period

You have the option here of explicitly defining the start

and/or end time of the assignment period, in which jobs willbe assigned.


12/28

Calendar Settings

The calendar settings dialog allows

you to set the available time and the

shift of each resource for each day.


13/28

The tool settings dialog

allows you to register

external tools in Asprova.

Tools Settings


14/28


15/28

Asprova's Graph window


16/28

Asprova's Graph window (contd.)


17/28



18/28



19/28



20/28



21/28



22/28

Asprova's Basic Samples


23/28

One way to express these on the database is by

grouping. For example, designate the group of

items which can be produced with K1 as group A1,

and the group of items which can be produced

with K2 and K3 as group A2 in the Item Table.Then in the resource capacity table, set the output

item of resource K1 to group A1, and the output

item of resources K2, K3 to A2. Note that this

example is a simple one and you can perform the

same designation job without grouping. Just set

the output item of each resource in the resource

capacity table one by one.

In this sample, two resources are used in one

production process. In this case, the molding

machine is called the main resource and the metal

mold is called the secondary resource. When the

secondary resource is used, it is necessary to

define the required data in the resource table.

Asprova's Basic Samples (contd.)


24/28


25/28

Asprovas Benefits

Helps to reduce on-hand inventory.

Dramatically reduces schedule generation time

from several hours to seconds. Cuts order turnaround time.

Promotes consistency in production schedules

and delivery schedules across the plant. Greatly

improves shop-floor discipline by following theschedules generated.


26/28


27/28

Asprovas Benefits (contd.)

What-if analysis capabilities are able to

determine the possibility of eliminating a shiftwithout negatively affecting throughput.

Increases clients on-time delivery rate to the

warehouse.


28/28

Documents

Asprova Threejjjjjj