Could you give some more context?

Here's the whole paragraph:
Die Technologie der ‚Web-Services‘ geht noch einen Schritt weiter. Hier werden verschiedene Anwendungen und Anwendungsmodule zu jeweils neuen, kundenspezifischen Lösungen zusammengesetzt. Der scheinbare Widerspruch der ‚Standardsoftware als Losgröße 1‘ rückt damit in greifbare Nähe. Ein Zusammenschluss führender Hersteller in der ‚UDDI.org’ (Universal Description, Discovery and Integration) entwickelt derzeit Standards.
This is my translation of the rest of it:
‘Web Services’ technology goes one step further. This involves combining different applications and application modules to create new, customer-specific solutions. Thus, the apparent contradiction of ‘standard software als Losgröße 1’ comes within reach. A consortium of leading manufacturers in the ‘UDDI.org’ (Universal Description, Discovery and Integration) is currently developing standards.
I hope this makes the context clearer.

Leo, by the way, gives 5 translations for "Losgroesse". But which is meant here? "Standard software as batch size 1" - does that make sense? To anyone?

Ein Produkt, das über bestimmte, charakteristische Merkmale verfügt, wird mit Verfahren der Massenproduktion hergestellt. Im übertragenen Sinn bedeutet Losgröße 1 die Entwicklung weg von der Massenfertigung hin zu individualisierten Produkten.

.....

Der Widerspruch ist somit die "Standardsoftware als individuelles Produkt". (?)

Thanks mrkh. It's suddenly a whole lot clearer - your explanation fits perfectly with my context. So perhaps something like "tailor-made products" would be an idiomatic rendering. "Batch size 1" doesn't mean anything to me, but this is not my field, so I'm open to better suggestions.

"Standard software as batch size 1"

I work in a company that produces standard products (usually in large batch sizes) and in batch size/lot size 1 if the product is configurable for the customer and therewith customer specific to a certain extent. In this context says that these guys are able to produce software consisting out of only standards in batch size 1 this former contradiction becomes only a "seeming" contradiction. If you want to keep that contratiction within your sentence I would recommend "Standard software as batch size 1" or something similar. If you just want to describe that sort of product - we would call that customer specific... or more often configurable ....

#5: "Batch size 1" doesn't mean anything to me.

Same here. And I'm not convinced by #6.

Was kommt heraus, wenn Du "Serienfertigung mit einer Fertigungs-Losgröße von 500" übersetzt?

Nichts, weil Du Los/Charge -- batch nicht kennst? Oder wo liegt Dein Problem?

Adding my support to "Batch Size 1" and adding "Order of One" as a manufacturing concept for the sake of the archive.