Information systems for organizational effectiveness model: a rationale alignment

Despite the proposal of various Information Systems (IS) evaluation models and approaches, IS evaluation has never been straightforward. There are issues and challenges in proving the business value of IS. Adding to the difficulty, a vast number of measures have been employed conveniently for evaluation purposes without going through a rigorous validation process. Recognising the complexity for IS researchers, IS specialists, and business managers to agree on a common model for the evaluation of IS business value, this chapter presents an empirically validated IS evaluation model, the IS for organisational effectiveness (ISOE) model, for planning, designing, implementing, and appraising IS. There also emerges a new theory, the Information System business value (ISBV) theory, from the ISOE model to establish that IS business value is multifaceted and are observable in the form of improvements in organisational effectiveness

TESTING THE IRON HYPOTHESIS IN ECOSYSTEMS OF THE EQUATORIAL PACIFIC-OCEAN

The idea that iron might limit phytoplankton growth in large regions of the ocean has been tested by enriching an area of 64 km(2) in the open equatorial Pacific Ocean with iron. This resulted in a doubling of plant biomass, a threefold increase In chlorophyll and a fourfold increase in plant production. Similar increases were found in a chlorophyll-rich plume downstream of the Galapagos Islands, which was naturally enriched in iron. These findings indicate that iron limitation can control rates of phytoplankton productivity and biomass in the ocean.X11968Nsciescopu