Network planning technology was developed and developed in the United States in the late 1950s. This approach includes a variety of web-based methods, such as critical path method, planning review technology, combined network method, etc. Not long ago, U.S. debt long positions were near historic highs. The CFTC's holdings report showed that as of Dec. 12, the 30-year U.S. debt had a net gain of 10.091 million, the highest level since last July. Mr Draghi added that this meant that the ECB staff and its council were "cautious" in the "bold" stance of inflation. Activity-based costing (ABC) is an efficient management technique for assigning and governing the overhead costs. Overhead expense analysis and assignment can be produced more accurate through the use of ABC processes for a wide range of products, for product expenses and profitability analysis as well as for appropriate distribution and control over the overheads. Apple has released some incredible huge facts for their third quarter of 2011, with quarterly revenue reaching $28.7 billion, growing 82% year over year along with a net gain of $7.31 billion. Steve Jobs, Apple's CEO said: 'We're thrilled to deliver good quarter ever, with revenue up 82 percent and profits up 125 percent.' and the man added 'Right now, we're very focused and pumped up about bringing iOS 5 and iCloud to the users this fall.' (3) monetary benefits -- increase the monetary value of assets. There are both measurable and unquantifiable benefits in these three different forms of income. Among them: mental income is too strong to measure, monetary gain is easy to measure because of the static concept of value change. Economists, therefore, focus only on actual earnings.