ASME GDTP Senior Level study plan
ASME GDTP Senior Level · Give each week a clear focus.
8 weeks · About 6 hours per week
Datum Reference Frames and Datum Systems & Fundamentals and Scope of GD&T per ASME Y14.5
Write out from memory the six degrees of freedom and explain how each is constrained by a primary, secondary, and tertiary datum
Construct three datum reference frame scenarios (primary plane/secondary plane/tertiary plane, axis-primary, and two-hole pattern) and label the DOF constrained at each stage
Distinguish between datum features, datums, and datum simulators using Y14.5 terminology and correct the misuse of each in a set of self-written flawed statements
Summarize the scope and authority of Y14.5 and list what the standard does and does not govern
Your checkpoint
A one-page DOF constraint matrix mapping each of the six DOF to primary/secondary/tertiary for three datum schemes, plus a 10-item terminology self-quiz scored to 90% or better
Datum Reference Frames and Datum Systems & Symbols, Terms, and Definitions
Apply datum feature precedence rules to at least five self-authored part scenarios and justify the chosen primary datum
Differentiate datum feature modifiers (MMB/LMB) from feature control frame modifiers and state the effect of each on the datum reference frame
Match every GD&T symbol in Y14.5 to its name, category (form, orientation, location, profile, runout), and the type of feature it may control
Define each of the key terms (MMC, LMC, actual mating envelope, virtual condition, bonus tolerance) in your own words without looking them up
Your checkpoint
A completed symbol-and-term reference table covering all 14 characteristics plus modifiers, self-graded against the standard with all errors corrected
Location Tolerances and Controls & Tolerance of Position and Bonus Tolerance / MMC-LMC Concepts
Calculate bonus tolerance and virtual condition for at least eight position callouts spanning MMC, LMC, and RFS modifiers
Determine the allowable position deviation for a hole and a pin at their respective limits using the boundary method
Explain how a position tolerance at MMC creates a fixed-size boundary and verify that boundary numerically for three examples
Set up and solve a two-feature pattern position problem including a projected tolerance zone
Your checkpoint
A worked problem set of 10 position/bonus-tolerance calculations with fully shown arithmetic and a self-check answer key
Form Tolerances and Controls & Orientation Tolerances and Controls
Distinguish form controls (flatness, straightness, circularity, cylindricity) from orientation controls by identifying which require a datum reference
Apply the envelope requirement and the independency principle to determine whether a size feature passes inspection at MMC
Compute the orientation deviation permitted for perpendicularity, parallelism, and angularity callouts applied to surfaces and to axes
Identify rule violations in a set of self-written feature control frames (missing datum, wrong modifier, wrong characteristic for the feature type)
Your checkpoint
A 15-question mixed form/orientation quiz with written justifications for each answer, scored and corrected to 85% or better
Profile Tolerances and Controls & Runout Tolerances and Controls
Differentiate profile of a surface from profile of a line and state when each is the appropriate control
Determine the bilateral, unilateral, and unequally disposed profile tolerance zone boundaries for given callouts
Explain how profile can establish a datum and how a profile tolerance interacts with a datum reference frame
Contrast circular runout with total runout and describe what each does and does not control relative to orientation and location
Your checkpoint
A profile and runout interpretation worksheet of 12 callouts with sketched tolerance zones described in words and verified answers
Location Tolerances and Controls & Tolerance of Position and Bonus Tolerance / MMC-LMC Concepts
Re-solve the week 3 position problems using the boundary/virtual condition method and reconcile both results
Analyze composite position tolerances by separating the pattern-locating segment from the feature-relating segment
Evaluate a position callout at LMC and explain the inspection implications for a clearance fit
Identify when position, concentricity, or symmetry is the correct control and justify the choice
Your checkpoint
A composite position case study (one self-authored drawing description) with a full tolerance-zone analysis and inspection plan
Application, Inspection, and Interpretation of GD&T on Drawings & Profile Tolerances and Controls
Walk through a complete inspection sequence for a multi-feature part, ordering measurements to respect datum precedence
Interpret a full feature control frame set on a self-authored drawing and predict accept/reject for six supplied measurement sets
Diagnose common drawing errors that make a part uninspectable and propose corrected callouts
Reconcile profile and position controls applied to the same feature and explain which governs
Your checkpoint
A full drawing-interpretation and inspection report for one self-authored part with six accept/reject determinations and justifications
Fundamentals and Scope of GD&T per ASME Y14.5 & Symbols, Terms, and Definitions & Datum Reference Frames and Datum Systems & Form Tolerances and Controls & Orientation Tolerances and Controls & Location Tolerances and Controls & Profile Tolerances and Controls & Runout Tolerances and Controls & Tolerance of Position and Bonus Tolerance / MMC-LMC Concepts & Application, Inspection, and Interpretation of GD&T on Drawings
Complete a timed 60-question cumulative practice exam spanning all ten domains
Review every missed item and trace the error to a specific domain and concept gap
Re-derive the DOF matrix, bonus tolerance method, and virtual condition rules from memory as a final retention check
Build a personal error log categorized by domain and rank remaining weak areas
Your checkpoint
A scored cumulative practice exam (target 80% or better) with a categorized error log and a prioritized list of remaining weak domains
Milestones
Week 2: Can state all six degrees of freedom, assign them to a three-plane datum reference frame, and name every GD&T symbol with its category without references
Week 4: Scores 85% or better on a self-administered form/orientation quiz and correctly computes virtual condition for at least three callouts
Week 6: Correctly solves composite position and MMC/LMC problems using both the arithmetic and boundary methods and reconciles the results
Week 8: Scores 80% or better on the cumulative 60-question practice exam with a written error log covering all ten domains