Review profiles for drawings

Focus on manufacturability for CNC machining. Flag missing tolerances on fit dimensions and critical features. Check surface finish callouts (Ra values) on machined surfaces. Verify thread callouts include class of fit. Standard tolerance: +/-0.1mm general, +/-0.05mm for fits. Always flag missing surface finish callouts. Check that all holes have depth specifications.

Review for sheet metal manufacturing. We stock 4mm, 6mm, and 8mm sheets in mild steel and stainless — flag other thicknesses or materials. Max sheet size: 3000 x 1500mm. Flag parts exceeding this. Our laser holds ±0.1mm; flag tighter tolerances. Minimum bend radius: 2× material thickness. Flag features too close to bend lines (min 4× thickness). Check bend relief near holes/edges. Verify material and thickness specified. Flag weld symbols missing weld type or size.

Review for welding and fabrication. Check all weld symbols include weld type, size, and length. Verify joint preparation details are specified. Flag missing weld quality standards (e.g., AWS D1.1). Check for adequate access for welding equipment. Verify material compatibility for welding. Flag incomplete or ambiguous weld callouts.

Review for 3D printing / additive manufacturing. Check minimum wall thickness (typically 0.8mm for FDM, 0.4mm for SLA). Flag overhangs greater than 45° without support considerations. Verify build orientation is considered for critical surfaces. Check that tolerances account for typical AM accuracy (±0.2mm). Flag features that may require post-processing.

Review for casting manufacturability. Check for uniform wall thickness to prevent shrinkage defects. Flag sharp internal corners (need fillets for mold flow). Verify draft angles on vertical surfaces (typically 1-3°). Check parting line location considerations. Flag undercuts that would prevent mold release. Verify material is specified as a castable alloy.

Identify opportunities to reduce manufacturing cost. Flag tolerances tighter than the function requires. Flag surface-finish callouts specified more strictly than necessary. Flag features that drive expensive operations (small internal radii, non-standard hole or thread sizes, features requiring multiple machine setups). For each finding, suggest a relaxed alternative that preserves design intent.

This is aerospace work — verify all materials are specified. Ensure thread callouts include class of fit. Flag any dimension without GD&T when position is critical. Check for material certifications and traceability requirements. Verify surface finish specifications on all critical surfaces. Flag missing heat treatment or coating callouts.

Review for automotive industry standards. Check GD&T compliance with ASME Y14.5 or ISO GPS. Verify material specifications include automotive-grade designations. Flag missing PPAP-relevant dimensions. Check surface finish requirements for sealing and bearing surfaces. Verify tolerance stack-up considerations for assembly.

Review for medical device manufacturing. Check all critical dimensions have tight tolerances specified. Verify biocompatible materials are specified where required. Flag missing surface finish requirements (especially for implant or fluid-contact surfaces). Check for traceability and lot identification requirements. Verify compliance callouts (FDA, ISO 13485).

Presentation check of structural steel shop drawings. The drawing is likely from Tekla or SDS2. Flag everything that is clearly incorrect, but also anything where the drawing simply could be presented in a better way. Check only the drawing, the design itself was verified in the 3D model and is not under review here. A sheet that goes back to the detailer holds up the piece, so a presentation problem is a real finding here. FLAG: * annotations that overlap and could be placed better (like a dimension, weld symbol, slot callout or piece mark sitting on top of another, their support lines, or on the steel), whether or not the text can still be made out. * Missing overall dimensions on the assembly or part. * Missing edge distances for holes and slots. * EVERYTHING LOCATED TO A MATERIAL EDGE. Every hole, slot, fitting and cut must be tied back to one, either by its own dimension or through a chain that reaches one. One anchored end is enough: a chain that starts at a material edge locates everything along it. Work through the sheet in this order: the outline of the member or plate, then each hole and slot group, then each fitting and attached plate by its piece mark, then the overall dimensions across the sheet. For each distance dimension, follow its extension lines to where they actually land and name what is at each end. Check for: a run of dimensions with nothing between the end feature and the material edge, for example a 4, 10 1/4, 4 chain across a plate with no dimension from the end holes to the ends of the plate; a hole or slot group given a gauge but nothing locating the group itself; an extension line that lands on another dimension, a leader or a centre line instead of on material; a dimension taken to the edge of a fitting where it should reach the edge of the plate. The one exception is an assembly overall, which runs to the work point rather than to the material edge. Go one by one. The one missing among many present is the easiest to miss, so do not stop early. * A dimension anchored to the wrong feature. Look at where its extension lines actually land: an overall dimension on a plate runs edge to edge, and on a member it runs to the work point. Flag one that stops short of, or reaches past, what it is meant to measure. * Any joint shown without weld information, whether by symbol, weld table or general note. * Bill of material rows missing size, grade, length or quantity. * Duplicate marks, and the same measurement stated twice in the same direction. A chain closing against an overall is not a duplicate: both are numbers the shop works from. * Two callouts describing the same hole or slot pattern where one would do, for example the same diameter and gauge appearing twice, once plain and once with a side suffix such as (N/S) or (B/S). DO NOT FLAG: * the absence of GD&T, geometric tolerancing, ISO GPS or ASME references, or surface finish values. Steel shop drawings do not carry them. * A material grade, finish or paint specification given once in a general note or the title block rather than repeated per row. * Detail that belongs on the companion sheet: an assembly drawing need not repeat what its part drawing carries, so when a mark is drawn elsewhere in the same package, name that sheet instead of calling it missing. * Member sizes, connection design and dimension values, all settled in the model. * An empty checked by or approved by field in the title block.

Early design phase — focus on engineering intent, not documentation. Check critical dimensions and material are specified. Ignore title block completeness, revision info, general surface finish. Flag anything that would prevent the part from functioning. Focus on form, fit, and function rather than drawing standards.

Review as incoming quality inspector. Focus on measurement feasibility with standard instruments. Check datum references are defined and measurable. Verify GD&T callouts reference appropriate datums. Ensure surface finish specified with standard Ra values.

Focus on tolerancing completeness and correctness. Check that all critical dimensions have explicit tolerances. Verify general tolerance block is present and appropriate. Flag over-toleranced dimensions that increase cost unnecessarily. Check tolerance stack-ups for assembled features. Verify datum references are consistent and logical.