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Mechanical Engineering Technology

MEC 1012

Assignments

MEC 1012 - Design Communication II
Assignment 5
Assignment 3 Completion and Revision Control

Assignment 3 was too large, so A5 includes the completion of A3 followed by a small amount on new material. The combination is due at the end of your TXL meeting in week 12 and will be graded out of 100 points. Each student must meet the conditions and objectives of this assignment in order to earn a passing grade in the course.

Overview:

Design teams may reach the point where they need to keep careful record of design changes. Usually, as a design nears production or the making of costly production tooling, a team will need to expose the still evolving design to toolmakers and manufacturing planners in a way that allows everyone to keep track of any future changes (called revisions).

Imagine a situation where you have to release (think expose) your A3 design to manufacturing (Revision A). You know that manufacturing will pass along your Base Casting drawing and 3D model to a toolmaker. You say you don’t expect the overall part size to change, so the toolmaker can go ahead and buy steel and standard components for the die. Meanwhile, the design continues to evolve in one place while a copy of the released design is held ‘frozen’ or ‘locked’ in an archive for records.

Later, when you think the design is ready for the die to be cut, you’ll need to let manufacturing know exactly what has changed, so you release the changed parts at Revision B and include revision blocks on the drawings that detail any changes since Revision A.

Revision levels might be indicated with letters in pre-production (A, B, C, …, Z, AA, AB, …AZ, BA, BB, etc.) and numbers after the start of production (or vice versa).

Further, there’s a need for anyone associated with the project to be able to ‘pull’ reliable design information at any time and without the cooperation of the designer. The designer should, therefore, establish a collection of the latest released revisions of each model and document.

Conditions:

        All of the Assignment 3 conditions still apply.

Objectives:

        Complete Assignment 3 objectives in the original location (V:\MEC\1012\Spring_05\Assignment3\TXA)

        Within the Assignment 5 folder, save a collection of you’re A3 files representing the evolving design.

        Release your design at Revision A.

        Save a collection representing the latest released revisions.

        Make at least two changes to your Base Casting, at least one change to another part or assembly, and at least one change to your design guide.

        Track your changes using revision blocks on any affected drawings (at least two) and using text in the design guide.

        Release your Revision B models, drawings and design guide.

        Update the collection of the latest released revisions.

        Turn in your A3 paper package and paper copies of your Revision B documents.

Procedure:

        Print your A3 drawings.

        Using Windows Explorer, make a folder in V:\MEC\1012\Spring_05\Assignment5\TXA and copy all A3 files (including your design guide) into it. This is where your evolving design will remain.

        Make a release folder under the last one and named, ‘AprilX_Release1_Manufacturing’ and copy in the same bunch of files.

        In the release folder, select the custom parts, assemblies, presentations and drawings. With the right-mouse open the iProperties dialog. On the Project tab, force the Revision Number of all selected files to be A. On the status tab change the design state to Released.

        Confirm that REV A appears in your title blocks, make .dwf files of each drawing and save in the release folder. Open your Design Guide and indicate with text that it’s Revision A. Close all files in the release folder, and then delete all but .dwf and .doc.

        Right-mouse on the release folder/ Send To/ Compressed (zipped) Folder to make a secure archive that can be easily attached to an email.

        Make a folder beside your release folder called, ‘Latest_Released_Revisions,’ and copy in the contents of the release folder.

        In the folder containing the evolving design, select the custom parts, assemblies, presentations and drawings. Again, with the right-mouse open the iProperties dialog. On the Project tab, force the Revision Number of all selected files to be BX. The B indicates that any changes are a part of Revision B and the X indicates that Revision B is not yet released (so it’s open for more changes). Make a similar indication in the Design Guide.

Start a cycle of revision and release:

        Activate a project file that uses your evolving design folder as a workspace.

        Make and track changes (with revision blocks and tags) to the collection of files that represents the evolving design. (Inventor uses the terms revision table and revision block interchangeably). See examples of revision blocks and tags in our text (p.342-343) or here.

        Make a new release folder next to the last one and named, ‘AprilX_Release2_Manufacturing’.

        Copy any revised files (including your design guide) from the evolving design folder into the new release folder.

        Modify the Revision Number of those files from BX to B to ‘lock’ the revision level. Also, change the design state from WorkInProgress to Released. Make new .dwf files as necessary, delete all but .dwf and .doc and compress.

        Back in the evolving design folder, increment the Revision Number of just-released files from BX to CX.

        Copy/replace the Revision B files from the new release folder to the ‘Latest_Released_Revisions’ folder.

That completes a cycle of revision and release.

Advice:

Keep it simple. Completeness and quality are more important than complexity.

Typical stuff you’ve seen before shown in this color

Developed by Mary Waldo and Paul Johnson April 2005