German industry remains the problem child of the economy, despite improved business expectations in the sector, according to one of the country’s leading economics institutes. The German Institute for Economic Research (DIW) said on Thursday that industry’s order situation “remains tense,” and that the order backlog has fallen almost continuously in recent months. The institute’s current economic barometer stood at 88 points in March, which is still well below the neutral 100-point mark. According to the DIW, this corresponds to an average growth in gross domestic product of around one third o…