Introduction to Software Testing

Progress ...

• What was needed was R&D into issues such as high stress, corrosion, decay, materials, construction.
• Public pressure forced some changes. Hence, the addition of two new safety features:
• A safety valve to reduce steam pressure when it reached “dangerous” levels.
• Fusible lead plugs that would melt when the temperature in boiler got too high.

Result?

• BOOM!
• The # of boiler explosions continued to increase.
• Why?
• Engineers still didn’t really understand the underlying problems of high pressure steam and boilers. That took quite a bit longer.