We are pleased to release the first update of GUNDALF this year as part of our continuing development plans. As usual, licensed users will receive automatic download instructions.

This is a minor upgrade nevertheless incorporating a number of significant enhancements based on suggestions from our users for both the Designer and Optimiser.

New features and calibration changes

These are now contained in full in the product help pages. Please contact us for details.

Released defect densities (externally found)

• Airgun modelling engine: 0.144 per thousand lines of code
• Graphical user interface: 0.238 per thousand lines of code

It is our policy to publish defect data for our products. In spite of an average of 1 release every 8 weeks since Gundalf first appeared in April 2002, these remain very low. For comparison, the NASA Shuttle software is amongst the most reliable software ever produced and is operating at around 0.1 per thousand lines of code. 2.0-4.0 per thousand lines of code is typical.

Once again, we thank you for your support and feedback and hope you enjoy this release. A number of exciting developments are already in the pipeline.