Self-flow Castable Crisis Passed Away?

Previously I mentioned on this topic, it was still on the small scale test. Due to the sucess in Lab., my superior decided the mass production. Raw material weighed and Chemicals prepared were all available without any error. Through mixed with Eirich High Speed Mixer made by Deutchland, sampling and testing were fullfil the ecperimental data. Everything looked like so smooth. The day the in-situ workablility test came, the test sample was plugged in the hose. As the sale informed this bad news, the superior requested to exam all self-flow product. The nightmare had came. All product was out of control. Too many variables were needed to check and narrow dawn them. After a long time struggle, my sueprior and I locked on the fine alumina powder and the mixing time and tried to adjust them. At this moment, the quility of self-flow castable mass product is stable. The third batch test sample was sent yesterday. But, I still worry about the third in-situ workability test.