Nest+ Allocated Area Calculation

 

See also Nest Based and Part Based Quoting: Understanding Area Calculations

 

Traditional Nest Based quoting has always provided the most accurate overall measure of material and machine usage, however a disadvantage in comparison to Part Based quoting is that individual parts have their costs affected by how they are nested and sequenced. Nearly identical parts may be assigned very different "item each" prices depending on where the parts are nested, what other parts they are nested with, and how the plates are sequenced. ie the total price is "fair", but the distribution between items sometimes appears "unfair".

Nest+ (introduced in ver 4.5.327) improves upon the original Nest Based quoting.

Nest+ will produce the same overall quote value and the old Nest Based system, now referred to as Nest (Legacy) . It calculates the prices in the same manner as Nest (legacy), however it then performs a "fair" redistribution of part charges within each material/thickness group by allocating each item a weighted fraction of the total cost as follows:

 

Total Ship Weight is simply the sum of the ship weights of the parts in the quote, and Item Ship Weight the total weight of parts represented by a single line item, ie the part ship weight  multiplied by the quantity required. Total Material Cost is based on the total material usage of the quote, as calculated by Nest (Legacy).

 

 

Machine Raw Time is the processing time excluding toolchanges and rapids, ie it is sequence and nest independent. The Item Raw Time and Total Machine Time Cost does include allowance for rapids and toolchanges, so these are still accounted for, but more evenly spread over the items.

 

In some cases where relatively simple parts are being nested and quoted together with particularly complex parts, the Nest (Legacy) method may be considered fairer so that the toolchanging and rapids involved in the complex parts "stay with " the complex parts instead of being shared with the simpler parts and thereby inflating their apparent costs, and deflating the complex part costs.

 

Consumable or cutting costs are unaffected by the Nest+ redistribution as they are themselves independent of nesting and sequencing, being charges per process length, start or time.