12/28/08 - l6 processescopyright 2009 - joanne degroat, ece, osu1 processes

12/28/08 - L6 Processes Copyright 2009 - Joanne DeGroat, ECE, OSU 1

Processes


Class 6 outline What is a Process Description? An outline for a Description Example Putting it all together

Ref: Finkelstein Ch5


Background Process descriptions are similar to mechanism

descriptions! Difference – in content

Mechanism description Describe the physical attributes of a mechanism and

how it operates Process description

Describe the steps of a process

But What is a Process?? “Process descriptions are precise portrayals

of events occurring over time that lead to some outcome.”

They describe The steps in the operation of a mechanism The steps in a conceptual process

Focus less on the physical attributes of the mechanism and more on a mechanism’s function and how the parts work together.


Process Description Example Internal Combustion Engine

Mechanism Description – the engine, the cylinder head, the block, the valves, the pistons, the crankshaft, …

Process Description The Intake stroke The Compression Stroke The Ignition (Combustion) Stroke The Exhaust Stroke


Process Description Introduction

Define the mechanism with a technical definition and add extensions necessary for the reader to understand the discussion.

Describe the purpose function, and operation of the mechanism.

List the major steps of the mechanism’s operation in the order that they will be discussed.


Process Description (2) Discussion

Step 1 Define the Step with a logical definition and discuss it in

reasonable depth. Describe the equipment, material, or concepts involved with this

step. Describe what happens during this step. Show the relationship between this step and the next.

Steps 2 to n Repeat as for step 1

Conclusion Summarize and provide closure.


A Process description of an Air Conditioner The Process

Uses a fluid refrigerant Four major components

The compressor The condenser coil The expansion valve The evaporator coil

The description discusses what happens in each step.


The type of process Process descriptions will vary depending on

what is being described. Computer Algorithms Physical Processes

Chemical Physical

Engines AC Systems


Consider the QuadFINKEL It is a figure skating jump. Text on pages 77 – 79

Can you do a QuadFINKEL???


Winemaking process The winemaking process is the process for

creating wine. The process varies slightly depending on the grape variety and the type of wine targeted. The process for red wines is typical of all of the variations.

Steps in the process.


Steps Pick the grapes when ripe. The grapes are crushed and the pulp of the grape,

along with the skin, is allowed to ferment. Primary fermentation takes 1 to 2 weeks. The liquid is transferred to vessels for secondary

fermentation. During secondary fermentation the remaining sugars are turned into alcohol.

The wine is transferred to oak barrels for aging. Aged wine is bottled.12/28/08 - L6 Processes Copyright 2009 - Joanne DeGroat, ECE, OSU 12

Option on assignment You can describe a mechanism OR Pick a process to describe. You can also do a Functional Mechanism

Description.


Group Assignments Groups have been formed Meet with your group Write up a “Team” agreement sheet that all team

members sign and get a copy of. Includes contact information Responsibilities Intent/ability to meet outside of class – pick a meeting

time or two that all can make Pick a Team Name - cannot be Buckeyes Turn in copy of signed agreement Wednesday as Monday

is a holiday.


12/28/08 - l6 processescopyright 2009 - joanne degroat, ece, osu1 processes

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