Bank of Queensland is to re-invest around six months' worth of last year's profit rise, A$15 million, to help fund "a program to reshape its organisational structure to better affect BOQ Group's strategy," the bank said yesterday.An announcement interpreted, at least by investors, as a wider profit warning paved the way to an eight per cent decline in the bank's share price yesterday to $11.66, close to $3 below last year's fleeting high point reached in November.The refined operating model being used by BOQ is one the bank spelled out, to some degree, in an investor briefing late last year, though no financial consequences warranted any highlights then.Jon Sutton, the bank's chief executive, said in a statement through the ASX yesterday that the size and shape of BOQ's business had changed over the past three years as the group had grown both organically and through acquisition. "We have redefined our strategy over the last 12 months and need to ensure our organisational structure continues to support this strategy," Sutton explained.He said that "to enable these organisational changes to be implemented, an investment in the order of $15 million, pre-tax, is anticipated to be incurred over the course of FY 16."He said the expense "will not be excluded from cash earnings."Sutton projected the investment "should deliver 100 per cent payback through cost savings within 12 months" and "help accelerate our path towards a cost to income ratio in the low 40 per cent range in the years ahead." A coda to the BOQ announcement will have unnerved investors further."The uncertainty in the global economic outlook over recent months has resulted in a significant increase in volatility in funding markets," the bank said, though it has undertaken little, if any, term debt issuance in public markets over that time."While strong competition for new business remains, this creates headwinds for our margin outlook," was how BOQ concluded its announcement, declining to give more specific details.