Advantages and Disadvantages of Achieving Each Drawing Level

 

Level One
Standard Compliant

Level Two
Mixed Method

Level Three
Functional Design

Advantages

Clear to determine if drawing meets guidelines

Quick to measure, easy to monitor for continuous improvement

Immediate improvement in drawing quality and enables some organizational benefits

Immediate improvement for inspection, outsourcing, suppliers

Promotes the use of GD&T

Creates an atmosphere where individuals must make drawings that follow standards

An easy win

All the advantages of Level One, plus the following:

Begins to promote the idea that the drawing contains the functional requirements for the part

Creates discussions about functional dimensioning

Immediate improvement for inspection, outsourcing, suppliers

Creates an atmosphere that individuals must communicate the part function through the part dimensioning

 

All the advantages of Level Two, plus the following:

Focuses the organization on the functional requirements for the part

Will be able to anticipate and resolve most product problems before production.

Shorter product development time

Lower inspection and tooling costs

Lower manufacturing costs

100% part interchangeability

Easier to evaluate product change requests

Disadvantages

Limited benefits to organization

May still encounter product problems

Does not promote the understanding of converting customer requirements into dimensional requirements

Creates ongoing struggles between engineering, manufacturing, and inspection.

May still encounter product problems

Is most difficult to measure and monitor for continuous improvement

Requires upper level management to create cross-department guidelines

Requires upper level management to create a company culture based on customer requirements

Some employees may not be able to make the transition

Requires a well trained workforce in all areas