bomcheck 2.5

Compare BOMs stored in Excel files

bomcheck

What the program does

The bomcheck.py program compares Bills of Materials (BOMs). BOMs from a CAD (Computer Aided Design) program like SolidWorks are compared to BOMs from an ERP (Enterprise Resource Planning) program like SyteLine. The CAD and ERP programs must be able to export to Excel files because that is where bomcheck gathers data from.

How to install

Assuming that you already have Python on your machine, use the package manager software pip that comes with Python and run this from a command line:

pip install bomcheck

Compared BOMs come from Excel files

The name of a file containing a BOM that comes from a CAD program must have the syntax: PartNumberOfBOM_sw.xlsx. That is, names like 0399-2344-005_sw.xlsx, 093352_sw.xlsx, and 35K2445_sw.xlsx are all legitimate file names. The names of the files from the ERP program have the same syntax, but instead end with _sl.xlsx. Thus the names will look like 0399-2344-005_sl.xlsx, 093352_sl.xlsx, and 35K2445_sl.xlsx. The program will match the 0399-2344-005_sw.xlsx file to the 0399-2344-005_sl.xlsx file, and so forth.

Multilevel BOMs are allowed

A file can contain a mulilevel BOM. In which case individual BOMs are extracted from a top level BOM. For a BOM from the ERP program to be recognized as a multilevel BOM, a column named "Level" must exist that gives the relative level of a subassembly to the main assembly. (The name "Level" can be altered with the file bomcheck.cfg. See info below.) The Level column starts out with "0" for the top level assembly, "1" for part/subassemblies under the main assembly, "2" for a part/subassembly under a Level "1" subassembly, and so forth. From the CAD program, it is similar. However item nos. indicate the Level, for example item nos. like 1, 2, 3, 3.1, 3.2, 3.2.1, 3.2.2, 3.3, 4, etc., where item 3 is a subassembly with parts under it.

How to run

Enter this on the command line to run:

bomcheck

(An easier way to get started is to use bomcheckgui)

Sample output

An Excel file is output. Shown below is an example of the result of a BOM comparison:

assy	Item	IQDU	Q_sw	Q_sl	Descripton_sw	Description_sl	U_sw	U_sl
730322	130031	XXXX		1		HOUSING		EA
	130039	XXXX	1		HOUSING		EA
	220978	‒‒‒‒	1	1	SPUR GEAR	SPUR GEAR	EA	EA
	275000	‒‒‒‒	0.35	0.35	TUBE	TUBE	FT	FT
	380000	‒‒‒‒	2	2	BEARING	BEARING	EA	EA
	441530	‒‒‒‒	1	1	SHIFT ASSY	SHIFT ASSY	EA	EA
	799944	‒‒X‒	1	1	SHAFT	AXLE	EA	EA
	877325	‒XX‒	3	1	PLUG	SQ. HEAD PLUG	EA	EA
	900000	‒‒‒‒	0.75	0.75	OIL	OIL	GAL	GAL
441530	433255	‒‒‒‒	1	1	ROD	ROD	EA	EA
	500000	‒‒‒‒	1	1	SHIFT FORK	SHIFT FORK	EA	EA
	K34452	‒‒‒‒	1	1	SPRING PIN	SPRING PIN	EA	EA

The column IQDU shows Xs if Item, Quantity, Description, or Unit of measure don't match between the two BOMs. Q_sw is the quantity per the CAD BOM, Q_sl per the ERP BOM, and so forth. In the example above, 1309031 is in the ERP BOM, but not in SolidWorks. 130039 is in the CAD's BOM, but not in the ERP's BOM.

Units of measure

If a Unit of Measure (U/M) is not given for a value in the Length column of a SolidWorks' BOM, then the U/M is assumed to be inches unless explicity specified, e.g. 336.7 mm. The program recognizes the follwing U/Ms:

in, inch, ", ft, ', feet, foot, yrd, yd, yard, mm, millimeter, cm, centimeter, m, meter, mtr, sqin, sqi, sqft, sqf, sqyd, sqy, sqmm, sqcm, sqm, pint, pt, qt, quart, gal, g, gallon, ltr, l, liter

When the program is run, values will be converted to the U/M given in the ERP's BOM. For example, if the ERP program uses FT as a U/M, then comparison results will be shown in feet.

bomcheck.cfg

Bomcheck has a configuration file available named bomcheck.cfg. With it the default U/M measure can be switched from inches to mm, or to some other U/M. Also, column names can be changed, and so forth. Within the bomcheck.cfg file are explanations about settings that can be employed. To get started, download the bomcheck.cfg from here, then open the file with a text editor and modify it as suits you best.

 

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You can try out the program online by clicking:    or ,    These are both Jupyter Notebooks. Open the file browser of the notebook (folder icon at upper left), create a folder named "mydata", and upload your data to it.

For more information, see the web page bomcheck_help.html